Martin Kehl - Academia.edu (original) (raw)
Papers by Martin Kehl
La Cueva de la Güelga, whose name in the local language refers to wet and shady sites, opens to t... more La Cueva de la Güelga, whose name in the local language refers to wet and shady sites, opens to the heart of a limestone mountain valley, forming a cul-de-sac. A stream flows from the current cave aperture and has configurated a karst system with corresponding terrace drain caverns that were successively occupied during the Middle and Upper Paleolithic. This group of rock shelters and caves has been divided into different sectors for investigation, which has developed from 1989 to the present. A-B and C areas are located on the lower terrace, occupied during the Magdalenian and Solutrean. At the top is D sector, with occupations attributed to Châtelperronian, Aurignacian and Mousterian. This valley, closed in itself, has provided numerous lithic remains in surfaces mostly attributable to Mode 3, surely exponents of intense and prolonged occupations. It is located 200 m above sea level, and along with Buxu and Azules caves, is a core site in the middle reaches of the Sella River, ter...
Eiszeitalter und Gegenwart, Jan 26, 2024
Quaternary International, Apr 1, 2023
EGU General Assembly Conference Abstracts, Apr 1, 2019
Environmental Archaeology
PLOS ONE
Until now, it was considered certain that the last reindeer hunters of the Ahrensburgian (tanged ... more Until now, it was considered certain that the last reindeer hunters of the Ahrensburgian (tanged point groups) existed exclusively in northwestern Central Europe during the Younger Dryas Cold Period (~ Greenland Stadial 1). The excavations carried out since 2006 on the forecourt (Vorplatz) of the small Blätterhöhle in Hagen on the northern edge of the Sauerland uplands of southern Westphalia (North Rhine-Westphalia, western Germany) have now changed this view. Beneath a surprisingly extensive sequence of Mesolithic find horizons, Pleistocene sediments could be reached whose excavations yielded a Final Palaeolithic lithic ensemble of the Younger Dryas, unusual for the region and beyond. It is characterised by numerous backed lithic projectile points of high variability. Comparisons suggest a typological-technological connection with the Western European Laborian / Late Laborian. Neither in the nearer nor in the wider surroundings has a comparable lithic find ensemble been found so fa...
Quaternary Research
We present stratigraphic, magnetic, diffuse reflectance spectrophotometric analyses, and chronolo... more We present stratigraphic, magnetic, diffuse reflectance spectrophotometric analyses, and chronologic data for the Chenarli loess–paleosol sequence in northeastern Iran. Eight loess units (LU) are identified, described, and constrained in time based on relative stratigraphy and luminescence dating from >130 ± 9.1 ka to ~9.8 ± 0.7 ka. Our data indicate that pedogenic magnetite/maghemite formation gives rise to magnetic enhancement in modern soil and paleosols. The top of LU 7 is demarcated by the well-developed last interglacial soil in which magnetic depletion occurred. We infer that magnetic depletion in this paleosol was produced by reducing conditions in a seasonally waterlogged soil during a warm and wet phase within Marine Isotope Stage (MIS) 5e. Units LU 6 to 1 record several episodes of dust accumulation and soil formation during the last glacial and Holocene. Increased dust accumulation rates occurred during middle-late MIS 3 and lasted into the late MIS 2, with a peak dur...
HAL (Le Centre pour la Communication Scientifique Directe), 2019
Earth Surface Processes and Landforms
The Laacher See volcano (LSV) is located at the western margin of the Neuwied Basin, the central ... more The Laacher See volcano (LSV) is located at the western margin of the Neuwied Basin, the central part of the Middle Rhine Basin of Germany. Its paroxysmal Plinian eruption c. 13 ka ago (Laacher See event; LSE) deposited a complex tephra sequence in the Neuwied Basin, whilst the distal ashes became one of the most important chronostratigraphic markers in Central Europe. However, some other impacts on landscape formation have thus far been largely neglected, such as buried gully structures in the proximity of the LSV. In this contribution, we map and discuss the spatial extent of these landforms at the site Lungenkärchen c. 4 km south of the LSV based on geophysical prospection as well as contrasting pedo‐sedimentary characteristics of the gully infill (particle‐size distribution, bulk‐sediment density, thin‐section analysis, saturated hydraulic conductivity) and the surrounding soils and tephra layers. These data are combined with a luminescence‐ and carbon‐14 (14C)‐based age model t...
El Cuaternario Ibérico: investigación en el s. XXI: VIII Reunión de Cuaternario Ibérico (Sevilla - La Rinconada 2013), 2013, ISBN 978-84-695-8601-3, págs. 136-140, 2013
Geosciences, 2022
The Sodicho Rockshelter in the southwestern Ethiopian Highlands presents a unique site that conta... more The Sodicho Rockshelter in the southwestern Ethiopian Highlands presents a unique site that contains sediments of Upper Pleistocene and Holocene occupation phases of hunter-gatherer communities. Excavations and previous geoarchaeological research provided a first 14C chronostratigraphic framework for the last 27 ka cal BP, which supports the hypothesis of a potential environmental refugium during the Late Glacial Maximum (LGM, ~21 ± 2 ka). Nonetheless, it is necessary to extend the preliminary interpretation of stone tool assemblages, and the geoarchaeological analyses carried out so far to provide in-depth information on prehistoric human behavior at the site under changing climatic and environmental conditions. In this study, we reinvestigate the complex stratigraphy and the paleoclimatic context of Sodicho in order to expand the knowledge about site formation, post-depositional disturbances, weathering influences, and the anthropogenic impact on the sediment deposits. Micromorpho...
E&G Quaternary Science Journal, 2005
1 Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Köln (Cologne)/Germ... more 1 Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Köln (Cologne)/Germany 2 Department of Geology, University of Liège, Liège/Belgium 3 Commission for Archaeology of Non-European Cultures (KAAK), Dürenstr. 35-37, 53173 Bonn/Germany 4 Neanderthal Museum, Talstraße 300, 40822 Mettmann/Germany 5 Institut National des Sciences de l'Archéologie et du Patrimoine (INSAP), 1, rue Ghandi, Rabat/Morocco
International Journal of Plant Production, 2011
The effects of 34 years cultivation on organic carbon content of the loess derived soils were stu... more The effects of 34 years cultivation on organic carbon content of the loess derived soils were studied in Golestan province, northern Iran. Soil organic carbon (SOC) showed significant decrease in most of cases. The minimum and maximum SOC decreases were 4 and 51.14 Mg C ha -1 /30 cm for 34 years. In a few cases there was an increase in SOC up to 16.93 Mg C ha -1 /30 cm over the period of 34 years indicating a favorable management, application of manure, and incorporation of the crop residues. Permanganate-oxidizable carbon (POC) was used to establish the potential loss of SOC, which was estimated between 38.07 and 72.32 Mg C ha -1 /30 cm. The (Clay + Silt)/OC ratio had a negative significant (P<0.05) correlation with POC content, confirming the effect of fine particles in conserving of soil organic matter.
Estado actual del conocimiento de la Sima del complejo kárstico de Palomas. Se ha presentado su e... more Estado actual del conocimiento de la Sima del complejo kárstico de Palomas. Se ha presentado su enmarque geográfico y geológico y se ha valorado la historia de las investigaciones desarrolladas. Se han expuesto las actividades y tareas arqueológicas desarrolladas, así como una serie de analíticas científicas que ha realizado un equipo amplio de investigadores españoles y alemanes de diversas universidades y centros de investigación.Peer reviewe
Quaternary Science Reviews, 2017
La Cueva de la Güelga, whose name in the local language refers to wet and shady sites, opens to t... more La Cueva de la Güelga, whose name in the local language refers to wet and shady sites, opens to the heart of a limestone mountain valley, forming a cul-de-sac. A stream flows from the current cave aperture and has configurated a karst system with corresponding terrace drain caverns that were successively occupied during the Middle and Upper Paleolithic. This group of rock shelters and caves has been divided into different sectors for investigation, which has developed from 1989 to the present. A-B and C areas are located on the lower terrace, occupied during the Magdalenian and Solutrean. At the top is D sector, with occupations attributed to Châtelperronian, Aurignacian and Mousterian. This valley, closed in itself, has provided numerous lithic remains in surfaces mostly attributable to Mode 3, surely exponents of intense and prolonged occupations. It is located 200 m above sea level, and along with Buxu and Azules caves, is a core site in the middle reaches of the Sella River, ter...
Eiszeitalter und Gegenwart, Jan 26, 2024
Quaternary International, Apr 1, 2023
EGU General Assembly Conference Abstracts, Apr 1, 2019
Environmental Archaeology
PLOS ONE
Until now, it was considered certain that the last reindeer hunters of the Ahrensburgian (tanged ... more Until now, it was considered certain that the last reindeer hunters of the Ahrensburgian (tanged point groups) existed exclusively in northwestern Central Europe during the Younger Dryas Cold Period (~ Greenland Stadial 1). The excavations carried out since 2006 on the forecourt (Vorplatz) of the small Blätterhöhle in Hagen on the northern edge of the Sauerland uplands of southern Westphalia (North Rhine-Westphalia, western Germany) have now changed this view. Beneath a surprisingly extensive sequence of Mesolithic find horizons, Pleistocene sediments could be reached whose excavations yielded a Final Palaeolithic lithic ensemble of the Younger Dryas, unusual for the region and beyond. It is characterised by numerous backed lithic projectile points of high variability. Comparisons suggest a typological-technological connection with the Western European Laborian / Late Laborian. Neither in the nearer nor in the wider surroundings has a comparable lithic find ensemble been found so fa...
Quaternary Research
We present stratigraphic, magnetic, diffuse reflectance spectrophotometric analyses, and chronolo... more We present stratigraphic, magnetic, diffuse reflectance spectrophotometric analyses, and chronologic data for the Chenarli loess–paleosol sequence in northeastern Iran. Eight loess units (LU) are identified, described, and constrained in time based on relative stratigraphy and luminescence dating from >130 ± 9.1 ka to ~9.8 ± 0.7 ka. Our data indicate that pedogenic magnetite/maghemite formation gives rise to magnetic enhancement in modern soil and paleosols. The top of LU 7 is demarcated by the well-developed last interglacial soil in which magnetic depletion occurred. We infer that magnetic depletion in this paleosol was produced by reducing conditions in a seasonally waterlogged soil during a warm and wet phase within Marine Isotope Stage (MIS) 5e. Units LU 6 to 1 record several episodes of dust accumulation and soil formation during the last glacial and Holocene. Increased dust accumulation rates occurred during middle-late MIS 3 and lasted into the late MIS 2, with a peak dur...
HAL (Le Centre pour la Communication Scientifique Directe), 2019
Earth Surface Processes and Landforms
The Laacher See volcano (LSV) is located at the western margin of the Neuwied Basin, the central ... more The Laacher See volcano (LSV) is located at the western margin of the Neuwied Basin, the central part of the Middle Rhine Basin of Germany. Its paroxysmal Plinian eruption c. 13 ka ago (Laacher See event; LSE) deposited a complex tephra sequence in the Neuwied Basin, whilst the distal ashes became one of the most important chronostratigraphic markers in Central Europe. However, some other impacts on landscape formation have thus far been largely neglected, such as buried gully structures in the proximity of the LSV. In this contribution, we map and discuss the spatial extent of these landforms at the site Lungenkärchen c. 4 km south of the LSV based on geophysical prospection as well as contrasting pedo‐sedimentary characteristics of the gully infill (particle‐size distribution, bulk‐sediment density, thin‐section analysis, saturated hydraulic conductivity) and the surrounding soils and tephra layers. These data are combined with a luminescence‐ and carbon‐14 (14C)‐based age model t...
El Cuaternario Ibérico: investigación en el s. XXI: VIII Reunión de Cuaternario Ibérico (Sevilla - La Rinconada 2013), 2013, ISBN 978-84-695-8601-3, págs. 136-140, 2013
Geosciences, 2022
The Sodicho Rockshelter in the southwestern Ethiopian Highlands presents a unique site that conta... more The Sodicho Rockshelter in the southwestern Ethiopian Highlands presents a unique site that contains sediments of Upper Pleistocene and Holocene occupation phases of hunter-gatherer communities. Excavations and previous geoarchaeological research provided a first 14C chronostratigraphic framework for the last 27 ka cal BP, which supports the hypothesis of a potential environmental refugium during the Late Glacial Maximum (LGM, ~21 ± 2 ka). Nonetheless, it is necessary to extend the preliminary interpretation of stone tool assemblages, and the geoarchaeological analyses carried out so far to provide in-depth information on prehistoric human behavior at the site under changing climatic and environmental conditions. In this study, we reinvestigate the complex stratigraphy and the paleoclimatic context of Sodicho in order to expand the knowledge about site formation, post-depositional disturbances, weathering influences, and the anthropogenic impact on the sediment deposits. Micromorpho...
E&G Quaternary Science Journal, 2005
1 Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Köln (Cologne)/Germ... more 1 Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Köln (Cologne)/Germany 2 Department of Geology, University of Liège, Liège/Belgium 3 Commission for Archaeology of Non-European Cultures (KAAK), Dürenstr. 35-37, 53173 Bonn/Germany 4 Neanderthal Museum, Talstraße 300, 40822 Mettmann/Germany 5 Institut National des Sciences de l'Archéologie et du Patrimoine (INSAP), 1, rue Ghandi, Rabat/Morocco
International Journal of Plant Production, 2011
The effects of 34 years cultivation on organic carbon content of the loess derived soils were stu... more The effects of 34 years cultivation on organic carbon content of the loess derived soils were studied in Golestan province, northern Iran. Soil organic carbon (SOC) showed significant decrease in most of cases. The minimum and maximum SOC decreases were 4 and 51.14 Mg C ha -1 /30 cm for 34 years. In a few cases there was an increase in SOC up to 16.93 Mg C ha -1 /30 cm over the period of 34 years indicating a favorable management, application of manure, and incorporation of the crop residues. Permanganate-oxidizable carbon (POC) was used to establish the potential loss of SOC, which was estimated between 38.07 and 72.32 Mg C ha -1 /30 cm. The (Clay + Silt)/OC ratio had a negative significant (P<0.05) correlation with POC content, confirming the effect of fine particles in conserving of soil organic matter.
Estado actual del conocimiento de la Sima del complejo kárstico de Palomas. Se ha presentado su e... more Estado actual del conocimiento de la Sima del complejo kárstico de Palomas. Se ha presentado su enmarque geográfico y geológico y se ha valorado la historia de las investigaciones desarrolladas. Se han expuesto las actividades y tareas arqueológicas desarrolladas, así como una serie de analíticas científicas que ha realizado un equipo amplio de investigadores españoles y alemanes de diversas universidades y centros de investigación.Peer reviewe
Quaternary Science Reviews, 2017