Claudio Mazzoli | Università degli Studi di Padova (original) (raw)

Conference Presentations by Claudio Mazzoli

Research paper thumbnail of Il sito delle colonne e il trasporto dei materiali architettonici lapidei nel Veneto romano

Papers by Claudio Mazzoli

Research paper thumbnail of Characterization of stone masonry panels consolidated by injection of grouts in buildings damaged by the 2009 Abruzzo earthquake

This contribution is part of a research project aimed at developing a methodology for the emergen... more This contribution is part of a research project aimed at developing a methodology for the emergency stabilization of historic buildings damaged by the 2009 Abruzzo earthquake through compatible injection grouts. Several portions of multi-leaf stone masonry walls from buildings in the towns of Onna, Tempera and Sant’Eusanio Forconese, all located near L’Aquila, were selected for experimental injection tests, planned and verified by means of multiscale characterization studies. The procedure and results of the preliminary studies on the historic mortars and the grouts are here reported. The materials were characterized from the petrographic, textural, mineralogical and chemical point of view through a multianalytical approach including petrographic examinations, particle size distribution studies, XRPD analyses, bulk chemical analyses by XRF and microchemical and microstructural studies by SEM-EDS. The original mortars were subdivided in different groups and a thorough knowledge of th...

Research paper thumbnail of Radionuclide concentration and radon exhalation in new mix design of bricks produced reusing NORM by-products: The influence of mineralogy and texture

Construction and Building Materials, 2020

h i g h l i g h t s Determination of radioprotection safety requirements for bricks reusing by-pr... more h i g h l i g h t s Determination of radioprotection safety requirements for bricks reusing by-products. An integrated approach based on radioactivity measurements, mineralogy and texture. Texture evolution during firing determine changes radon mobility and exhalation.

Research paper thumbnail of Use of industrial ceramic sludge in brick production: Effect on aesthetic quality and physical properties

Construction and Building Materials, 2016

h i g h l i g h t s Re-using sludge from the ceramic industry as an alternative eco-friendly addi... more h i g h l i g h t s Re-using sludge from the ceramic industry as an alternative eco-friendly additive. Aesthetic quality and physical properties of traditional bricks and new mix design. Economic and ecologic ways of developing bricks from recycled waste.

Research paper thumbnail of Aquileia e le cave delle regioni alto-adriatiche: il caso della trachite euganea

Arqueología de la construcción IV: las canteras en el mundo antiguo : sistemas de explotación y procesos productivos : Actas del congreso de Pavoda, 22-24 de noviembre de 2012, 2014, ISBN 978-84-00-09832-2, págs. 149-166, Sep 1, 2014

Research paper thumbnail of Tayma 2009 — 6th Report on the Saudi Arabian – German Joint Archaeological Project

Research paper thumbnail of ArcheomGIS: approccio GIS allo studio archeometrico della ceramica protostorica del Veneto

Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric a... more Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric analysis had in the past few interest, by the time it has revealed its potential in the identification of the main technological features and in the reconstruction of exchange or trade system of the ancient communities. At the present time in the Veneto region, this approach of study regards few archaeological contexts and sometimes with small ceramic samplings. The analysis concerned both single site and some micro-regional areas (i.e. the Adige and Po plain or Garda Lake). The chronological framework of the analysed pottery (mainly using OM, XRD and XRF), published up-to-date, cover a period comprised between Early Bronze and 2nd Iron Age and regards mostly settlements (the ceramic samples from cemeteries are very few) placed on different and various geological and geomorphological conformations. The present work is intended to offer a view of the available archaeometry data in Veneto, to discriminate potential technological characteristics, to identify possible ceramic exchange and to distinguish synchronically and diachronically the modus operandi of the ancient potters in a heterogeneous geo-lithological territory. One excellent instrument of combining these different kinds of data (archaeological and archaeometric) is through the use of an “open source” Geographci Information System (GIS), whose application is here submitted.

Research paper thumbnail of The application of SfM µ-photogrammetry to the understanding of material decay and morphology

In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts i... more In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts is an important issue both for operative and archiving reasons. Instruments such as Laser Targeting Systems (LTS) have been continuously improved, reaching unprecedented resolution down to 1 mm, becoming standard tools for fast 3D acquisitions of vast volumes or objects with complex shapes that couldn’t otherwise be measured. Nonetheless, LTS sensitivity can be not sufficient for the study of material decay throughout time and the description of the surface morphology. In order to fill this gap, in our research we tested Structure from Motion µ-photogrammetry, a completely non-invasive technique deepening the concept of photogrammetry [1]. The method has been applied on cemetery headstones (CWGC Cemetery, Padua, Italy) made of a compact white limestone (Botticino Stone, Italy). The chosen headstones were characterized by medium decay and were not surrounded by vegetation which would have impeded a rigorous multi-view image acquisition. An APS-C Reflex camera (Nikon D-300, equipped with a 24-85mm F/2.4-4 lens) set at 50 mm focal length was used and a special holding rack has been designed in order to minimize focusing error: for a slate of about 76x38x7.6 cm, about 600 shots have been taken. SfM images were then elaborated with Photoscan software to obtain 3D models with resolution of about 25 μm (Figure 1), allowing measurement of volume loss caused by surface recession and the identification of small-scale heterogeneities which are more prone to recession. We have thus shown that this innovative technique is an ideal tool in the study of decay of carbonate rocks and in the determination of surface recession rates.

Research paper thumbnail of Provenance of wine and oil amphorae in northern Adriatic: archaeometric and epigraphic approaches

ArchéoSciences, 2019

Revue d'archéométrie 43-2 | 2019 Varia Provenance of wine and oil amphorae in northern Adriatic: ... more Revue d'archéométrie 43-2 | 2019 Varia Provenance of wine and oil amphorae in northern Adriatic: archaeometric and epigraphic approaches Détermination d'origine des amphores à vin et à huile dans le nord de l'Adriatique : approches archéométrique et épigraphique

Research paper thumbnail of Textural Changes in Speleothem Inclusions during Firing: A Useful Tool to Estimate Temperature in Speleothem-Bearing Pottery

Archaeometry, 2016

Speleothem inclusions have been identified in a ceramic class, 'flared rim and flat lip' pottery,... more Speleothem inclusions have been identified in a ceramic class, 'flared rim and flat lip' pottery, that is widespread in the Friuli-Venetia Giulia and Veneto regions (north-eastern Italy) between the Final Bronze Age and the Early Iron Age. Textural analysis of speleothem inclusions revealed small rounded pores occurring along annual growth laminae, interpreted as the result of partial calcite decomposition during firing. Their size, number and diffusion at increasing temperatures were monitored during a set of firing experiments following heating and cooling rates, soaking times and redox conditions typical of open-firing kilns. The textural features of the speleothem inclusions turned out to represent a powerful thermometric tool to precisely determine firing temperature which, in the case of the 'flared rim and flat lip' pottery studied here, reduced the thermal interval to a greater extent than that obtained from mineralogical associations.

Research paper thumbnail of Technological transfer? Comparative analysis of 2nd–3rd/4th century CE “Late Roman” pottery from Taymāʾ, Saudi Arabia, and Petra, Jordan

Journal of Archaeological Science: Reports, 2017

Morphological and macroscopic analysis of 2nd-3rd/4th century CE pottery from Taymāʾ (Saudi Arabi... more Morphological and macroscopic analysis of 2nd-3rd/4th century CE pottery from Taymāʾ (Saudi Arabia) and Petra (Jordan) revealed important similarities regarding the shapes and macrofabrics of some vessels. This evidence motivated the present study to explore the possibility of ceramic trade between these two sites. On the basis of the results obtained from a multianalytical approach-based on petrographic, mineralogical and chemical analysis and their statistical treatments-the two productions were found to be both local at both sites. Since the production technology of these ceramic classes, in particular the selection of temper materials at Taymāʾ for certain bowls and jars, differs from their precursors at Taymāʾ, this paper will discuss the possibility of a transfer of technological knowledge from Petra to Taymāʾ during the Nabataean period, a shift that lead to the widespread use of this newly acquired technology between the 2nd and the 3rd/4th century CE.

Research paper thumbnail of Petrographic characterization and durability of carbonate stones used in UNESCO World Heritage sites in northeastern Italy

This paper presents the petrographic and textural characterization of some ornamental limestones ... more This paper presents the petrographic and textural characterization of some ornamental limestones widely used in UNESCO World Heritage sites in northeastern Italy, and the assessment of the main decay factors present in the environment where they are employed. Eleven carbonate building materials have been here considered, all commonly present in the built environment of northeastern Italy: two different varieties of Vicenza Stone (Nanto and Costozza), of Verona Stone (Red and Brown Verona), of Asiago Stone (Pink and White Asiago), and of Chiampo Stone (Ondagata and Paglierino), the Istria Stone (Orsera), the Aurisina Stone, and the Botticino Stone. The Carrara marble is also considered, and used as a reference material for the determination of the grain-size distribution. Stone durability was measured by accelerated ageing tests which reproduced freeze-thaw and salt crystallization cycles, among the main causes of deterioration in the region. Petrographic and textural features of the...

Research paper thumbnail of Further data concerning the pressure character of the Hercynian metamorphism in the West Carpathians (Czechoslovakia)

AIlSTRACT.-New data on the pressure character of the Hercynian metamorphism in the Czechoslovak W... more AIlSTRACT.-New data on the pressure character of the Hercynian metamorphism in the Czechoslovak West Carpadlians arc presented and discussed. Geobarometric estimations arc based on the b o values of muscovites from phyllites. Three sample populations are considered, corresponding to a total of 172 new h o values. One sample population (phyllites from the Brusnik Anticline) gives a mean bo value of 8.994 A (s _ 0.005; n _ 60). The other two sample populations (St6s Formation from the Gemericum; Predna Hola Complex from the Veporicum) supply significantly lower bo values, d~to the high Al-content of the rocks, shown by the systematic occurrence of paragonite. These new analytical data confirm that, in the West Carpathians as wdl as in the central part of the Alpine-Mediterranean Belt, the Hercynian metamorphism recorded in the phyllites, is of low.pressure (metamorphic thermal gradient about 40°C{km), with only one exception (Poiana Rusea, South Carpathians, Romania).

Research paper thumbnail of Visual Imaging of Benthic Carbonate-Mixed Factories in the Ross Sea Region Marine Protected Area, Antarctica

Minerals

Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic ... more Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic seas. Most information, however, derives from the post-mortem legacy of calcifying organisms. Prior imagery and evaluation of Antarctic habitats hosting calcifying benthic organisms are poorly present in the literature, therefore, a Remotely Operated Vehicle survey was carried out in the Ross Sea region Marine Protected Area during the 2013–2014 austral summer. Two video surveys of the seafloor were conducted along transects between 30 and 120 m (Adelie Cove) and 230 and 260 m (Terra Nova Bay “Canyon”), respectively. We quantified the relative abundance of calcifiers vs. non-calcifiers in the macro- and mega-epibenthos. Furthermore, we considered the typology of the carbonate polymorphs represented by the skeletonized organisms. The combined evidence from the two sites reveals the widespread existence of carbonate-mixed factories in the area, with an overwhelming abundance of both low-Mg...

Research paper thumbnail of SourcE and impact of greeNhousE gasses in AntarctiCA: the Seneca project

<p>... more <p>Current global climate changes represent a threat for the stability of the polar regions and may result in cascading broad impacts. Studies conducted on permafrost in the Arctic regions indicate that these areas may store almost twice the carbon currently present in the atmosphere. Therefore, permafrost thawing may potentially cause a significant increase of greenhouse gases concentrations in the atmosphere, exponentially rising the global warming effect. Although several studies have been carried out in the Arctic regions, there is a paucity of data available from the Southern Hemisphere. The Seneca project aims to fill this gap and to provide a first degree of evaluations of gas concentrations and emissions from permafrost and/or thawed shallow strata of the Dry Valleys in Antarctica. The Taylor and Wright Dry Valleys represent one of the few Antarctic areas that are not covered by ice and therefore represent an ideal target for permafrost investigations.</p><p>Here we present the preliminary results of a multidisciplinary field expedition conducted during the Antarctic summer in the Dry Valleys, aimed to collect and analyse soil gas and water samples, to measure CO<sub>2</sub> and CH<sub>4</sub> flux exhalation, to investigate the petrological soil properties, and to acquire geoelectrical profiles. The obtained data are used to 1) derive a first total emission estimate for methane and carbon dioxide in this part of the Southern Polar Hemisphere, 2) locate the potential presence of geological discontinuities that can act as preferential gas pathways for fluids release, and 3) investigate the mechanisms of gas migration through the shallow sediments. These results represent a benchmark for measurements in these climate sensitive regions where little or no data are today available.</p>

Research paper thumbnail of Petrophysical and mechanical properties of Euganean trachyte and implications for dimension stone decay and durability performance

Environmental Earth Sciences

Research paper thumbnail of Figure 8 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 4 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 13 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 12 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Characterization of stone masonry panels consolidated by injection of grouts in buildings damaged by the 2009 Abruzzo earthquake

This contribution is part of a research project aimed at developing a methodology for the emergen... more This contribution is part of a research project aimed at developing a methodology for the emergency stabilization of historic buildings damaged by the 2009 Abruzzo earthquake through compatible injection grouts. Several portions of multi-leaf stone masonry walls from buildings in the towns of Onna, Tempera and Sant’Eusanio Forconese, all located near L’Aquila, were selected for experimental injection tests, planned and verified by means of multiscale characterization studies. The procedure and results of the preliminary studies on the historic mortars and the grouts are here reported. The materials were characterized from the petrographic, textural, mineralogical and chemical point of view through a multianalytical approach including petrographic examinations, particle size distribution studies, XRPD analyses, bulk chemical analyses by XRF and microchemical and microstructural studies by SEM-EDS. The original mortars were subdivided in different groups and a thorough knowledge of th...

Research paper thumbnail of Radionuclide concentration and radon exhalation in new mix design of bricks produced reusing NORM by-products: The influence of mineralogy and texture

Construction and Building Materials, 2020

h i g h l i g h t s Determination of radioprotection safety requirements for bricks reusing by-pr... more h i g h l i g h t s Determination of radioprotection safety requirements for bricks reusing by-products. An integrated approach based on radioactivity measurements, mineralogy and texture. Texture evolution during firing determine changes radon mobility and exhalation.

Research paper thumbnail of Use of industrial ceramic sludge in brick production: Effect on aesthetic quality and physical properties

Construction and Building Materials, 2016

h i g h l i g h t s Re-using sludge from the ceramic industry as an alternative eco-friendly addi... more h i g h l i g h t s Re-using sludge from the ceramic industry as an alternative eco-friendly additive. Aesthetic quality and physical properties of traditional bricks and new mix design. Economic and ecologic ways of developing bricks from recycled waste.

Research paper thumbnail of Aquileia e le cave delle regioni alto-adriatiche: il caso della trachite euganea

Arqueología de la construcción IV: las canteras en el mundo antiguo : sistemas de explotación y procesos productivos : Actas del congreso de Pavoda, 22-24 de noviembre de 2012, 2014, ISBN 978-84-00-09832-2, págs. 149-166, Sep 1, 2014

Research paper thumbnail of Tayma 2009 — 6th Report on the Saudi Arabian – German Joint Archaeological Project

Research paper thumbnail of ArcheomGIS: approccio GIS allo studio archeometrico della ceramica protostorica del Veneto

Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric a... more Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric analysis had in the past few interest, by the time it has revealed its potential in the identification of the main technological features and in the reconstruction of exchange or trade system of the ancient communities. At the present time in the Veneto region, this approach of study regards few archaeological contexts and sometimes with small ceramic samplings. The analysis concerned both single site and some micro-regional areas (i.e. the Adige and Po plain or Garda Lake). The chronological framework of the analysed pottery (mainly using OM, XRD and XRF), published up-to-date, cover a period comprised between Early Bronze and 2nd Iron Age and regards mostly settlements (the ceramic samples from cemeteries are very few) placed on different and various geological and geomorphological conformations. The present work is intended to offer a view of the available archaeometry data in Veneto, to discriminate potential technological characteristics, to identify possible ceramic exchange and to distinguish synchronically and diachronically the modus operandi of the ancient potters in a heterogeneous geo-lithological territory. One excellent instrument of combining these different kinds of data (archaeological and archaeometric) is through the use of an “open source” Geographci Information System (GIS), whose application is here submitted.

Research paper thumbnail of The application of SfM µ-photogrammetry to the understanding of material decay and morphology

In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts i... more In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts is an important issue both for operative and archiving reasons. Instruments such as Laser Targeting Systems (LTS) have been continuously improved, reaching unprecedented resolution down to 1 mm, becoming standard tools for fast 3D acquisitions of vast volumes or objects with complex shapes that couldn’t otherwise be measured. Nonetheless, LTS sensitivity can be not sufficient for the study of material decay throughout time and the description of the surface morphology. In order to fill this gap, in our research we tested Structure from Motion µ-photogrammetry, a completely non-invasive technique deepening the concept of photogrammetry [1]. The method has been applied on cemetery headstones (CWGC Cemetery, Padua, Italy) made of a compact white limestone (Botticino Stone, Italy). The chosen headstones were characterized by medium decay and were not surrounded by vegetation which would have impeded a rigorous multi-view image acquisition. An APS-C Reflex camera (Nikon D-300, equipped with a 24-85mm F/2.4-4 lens) set at 50 mm focal length was used and a special holding rack has been designed in order to minimize focusing error: for a slate of about 76x38x7.6 cm, about 600 shots have been taken. SfM images were then elaborated with Photoscan software to obtain 3D models with resolution of about 25 μm (Figure 1), allowing measurement of volume loss caused by surface recession and the identification of small-scale heterogeneities which are more prone to recession. We have thus shown that this innovative technique is an ideal tool in the study of decay of carbonate rocks and in the determination of surface recession rates.

Research paper thumbnail of Provenance of wine and oil amphorae in northern Adriatic: archaeometric and epigraphic approaches

ArchéoSciences, 2019

Revue d'archéométrie 43-2 | 2019 Varia Provenance of wine and oil amphorae in northern Adriatic: ... more Revue d'archéométrie 43-2 | 2019 Varia Provenance of wine and oil amphorae in northern Adriatic: archaeometric and epigraphic approaches Détermination d'origine des amphores à vin et à huile dans le nord de l'Adriatique : approches archéométrique et épigraphique

Research paper thumbnail of Textural Changes in Speleothem Inclusions during Firing: A Useful Tool to Estimate Temperature in Speleothem-Bearing Pottery

Archaeometry, 2016

Speleothem inclusions have been identified in a ceramic class, 'flared rim and flat lip' pottery,... more Speleothem inclusions have been identified in a ceramic class, 'flared rim and flat lip' pottery, that is widespread in the Friuli-Venetia Giulia and Veneto regions (north-eastern Italy) between the Final Bronze Age and the Early Iron Age. Textural analysis of speleothem inclusions revealed small rounded pores occurring along annual growth laminae, interpreted as the result of partial calcite decomposition during firing. Their size, number and diffusion at increasing temperatures were monitored during a set of firing experiments following heating and cooling rates, soaking times and redox conditions typical of open-firing kilns. The textural features of the speleothem inclusions turned out to represent a powerful thermometric tool to precisely determine firing temperature which, in the case of the 'flared rim and flat lip' pottery studied here, reduced the thermal interval to a greater extent than that obtained from mineralogical associations.

Research paper thumbnail of Technological transfer? Comparative analysis of 2nd–3rd/4th century CE “Late Roman” pottery from Taymāʾ, Saudi Arabia, and Petra, Jordan

Journal of Archaeological Science: Reports, 2017

Morphological and macroscopic analysis of 2nd-3rd/4th century CE pottery from Taymāʾ (Saudi Arabi... more Morphological and macroscopic analysis of 2nd-3rd/4th century CE pottery from Taymāʾ (Saudi Arabia) and Petra (Jordan) revealed important similarities regarding the shapes and macrofabrics of some vessels. This evidence motivated the present study to explore the possibility of ceramic trade between these two sites. On the basis of the results obtained from a multianalytical approach-based on petrographic, mineralogical and chemical analysis and their statistical treatments-the two productions were found to be both local at both sites. Since the production technology of these ceramic classes, in particular the selection of temper materials at Taymāʾ for certain bowls and jars, differs from their precursors at Taymāʾ, this paper will discuss the possibility of a transfer of technological knowledge from Petra to Taymāʾ during the Nabataean period, a shift that lead to the widespread use of this newly acquired technology between the 2nd and the 3rd/4th century CE.

Research paper thumbnail of Petrographic characterization and durability of carbonate stones used in UNESCO World Heritage sites in northeastern Italy

This paper presents the petrographic and textural characterization of some ornamental limestones ... more This paper presents the petrographic and textural characterization of some ornamental limestones widely used in UNESCO World Heritage sites in northeastern Italy, and the assessment of the main decay factors present in the environment where they are employed. Eleven carbonate building materials have been here considered, all commonly present in the built environment of northeastern Italy: two different varieties of Vicenza Stone (Nanto and Costozza), of Verona Stone (Red and Brown Verona), of Asiago Stone (Pink and White Asiago), and of Chiampo Stone (Ondagata and Paglierino), the Istria Stone (Orsera), the Aurisina Stone, and the Botticino Stone. The Carrara marble is also considered, and used as a reference material for the determination of the grain-size distribution. Stone durability was measured by accelerated ageing tests which reproduced freeze-thaw and salt crystallization cycles, among the main causes of deterioration in the region. Petrographic and textural features of the...

Research paper thumbnail of Further data concerning the pressure character of the Hercynian metamorphism in the West Carpathians (Czechoslovakia)

AIlSTRACT.-New data on the pressure character of the Hercynian metamorphism in the Czechoslovak W... more AIlSTRACT.-New data on the pressure character of the Hercynian metamorphism in the Czechoslovak West Carpadlians arc presented and discussed. Geobarometric estimations arc based on the b o values of muscovites from phyllites. Three sample populations are considered, corresponding to a total of 172 new h o values. One sample population (phyllites from the Brusnik Anticline) gives a mean bo value of 8.994 A (s _ 0.005; n _ 60). The other two sample populations (St6s Formation from the Gemericum; Predna Hola Complex from the Veporicum) supply significantly lower bo values, d~to the high Al-content of the rocks, shown by the systematic occurrence of paragonite. These new analytical data confirm that, in the West Carpathians as wdl as in the central part of the Alpine-Mediterranean Belt, the Hercynian metamorphism recorded in the phyllites, is of low.pressure (metamorphic thermal gradient about 40°C{km), with only one exception (Poiana Rusea, South Carpathians, Romania).

Research paper thumbnail of Visual Imaging of Benthic Carbonate-Mixed Factories in the Ross Sea Region Marine Protected Area, Antarctica

Minerals

Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic ... more Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic seas. Most information, however, derives from the post-mortem legacy of calcifying organisms. Prior imagery and evaluation of Antarctic habitats hosting calcifying benthic organisms are poorly present in the literature, therefore, a Remotely Operated Vehicle survey was carried out in the Ross Sea region Marine Protected Area during the 2013–2014 austral summer. Two video surveys of the seafloor were conducted along transects between 30 and 120 m (Adelie Cove) and 230 and 260 m (Terra Nova Bay “Canyon”), respectively. We quantified the relative abundance of calcifiers vs. non-calcifiers in the macro- and mega-epibenthos. Furthermore, we considered the typology of the carbonate polymorphs represented by the skeletonized organisms. The combined evidence from the two sites reveals the widespread existence of carbonate-mixed factories in the area, with an overwhelming abundance of both low-Mg...

Research paper thumbnail of SourcE and impact of greeNhousE gasses in AntarctiCA: the Seneca project

<p>... more <p>Current global climate changes represent a threat for the stability of the polar regions and may result in cascading broad impacts. Studies conducted on permafrost in the Arctic regions indicate that these areas may store almost twice the carbon currently present in the atmosphere. Therefore, permafrost thawing may potentially cause a significant increase of greenhouse gases concentrations in the atmosphere, exponentially rising the global warming effect. Although several studies have been carried out in the Arctic regions, there is a paucity of data available from the Southern Hemisphere. The Seneca project aims to fill this gap and to provide a first degree of evaluations of gas concentrations and emissions from permafrost and/or thawed shallow strata of the Dry Valleys in Antarctica. The Taylor and Wright Dry Valleys represent one of the few Antarctic areas that are not covered by ice and therefore represent an ideal target for permafrost investigations.</p><p>Here we present the preliminary results of a multidisciplinary field expedition conducted during the Antarctic summer in the Dry Valleys, aimed to collect and analyse soil gas and water samples, to measure CO<sub>2</sub> and CH<sub>4</sub> flux exhalation, to investigate the petrological soil properties, and to acquire geoelectrical profiles. The obtained data are used to 1) derive a first total emission estimate for methane and carbon dioxide in this part of the Southern Polar Hemisphere, 2) locate the potential presence of geological discontinuities that can act as preferential gas pathways for fluids release, and 3) investigate the mechanisms of gas migration through the shallow sediments. These results represent a benchmark for measurements in these climate sensitive regions where little or no data are today available.</p>

Research paper thumbnail of Petrophysical and mechanical properties of Euganean trachyte and implications for dimension stone decay and durability performance

Environmental Earth Sciences

Research paper thumbnail of Figure 8 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 4 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 13 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Figure 12 from: Cecchetto M, Lombardi C, Canese S, Cocito S, Kuklinski P, Mazzoli C, Schiaparelli S (2019) The Bryozoa collection of the Italian National Antarctic Museum, with an updated checklist from Terra Nova Bay, Ross Sea. ZooKeys 812: 1-22. https://doi.org/10.3897/zookeys.812.26964

This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area,... more This study provides taxonomic and distributional data of bryozoan species from the Ross Sea area, mainly around Terra Nova Bay, based on specimens curated at the Italian National Antarctic Museum (MNA, Section of Genoa). Bryozoan specimens were collected at 75 different sampling stations in the Ross Sea and in the Magellan Strait, in a bathymetric range of 18-711 meters, during 13 expeditions of the Italian National Antarctic Research Program (PNRA) conducted between 1988 and 2014. A total of 282 MNA vouchers corresponding to 311 specimens and 127 morphospecies have been identified and included in the present dataset. 62% of the species were already reported for the Terra Nova Bay area, where most of

Research paper thumbnail of Punic black-gloss ware in Nora (south-western Sardinia, Italy): Production and provenance

Journal of Archaeological Science: Reports

The present archaeometric study of the Punic black-gloss ware found at the " Roman Templ... more The present archaeometric study of the Punic black-gloss ware found at the " Roman Temple " of Nora (southwestern Sardinia, Italy), dated at the end of the IV century BCE and the beginning of the II century BCE, was addressed to better define the exchanges of Punic ware, ideas and production skills within the west Mediterranean Sea. Petrographic and microstructural analyses at the scanning electron microscope (SEM) clearly indicate that the analysed pottery can be referred to two different productions, for which different base-clays were used, indicating different geological origin. On the basis of chemical composition, the black-gloss ware found at Nora can be traced back in part to the northern African area and in part to the western Sardinia coast at Tharros. None local production was identified. Moreover, on the basis of both the mineralogical composition and the microstructural features, samples produced in the northern African area and in western Sardinia definitely differ in terms of firing temperature. Therefore, on the basis of these results, a more complete scenario can be drawn on the commercial traffic active in the Western Mediterranean and in Sardinia between the end of the IV century and the first half of the II century BCE. Under a social perspective, Sardinia, thanks to its Phoenician, Punic and Italic influences, became an incubator of ideas, techniques and production knowledge that, from the interaction of the preceding cultures and their influences, gave life to many local productions, which were part of the greater phenomenon of Punic black-gloss ware in the western Mediterranean (Sardinia, Sicily, Northern Africa and the southern coasts of the Iberian Peninsula).