Huriye Demircan - Academia.edu (original) (raw)

Papers by Huriye Demircan

IOP Conference Series: Earth and Environmental Science, 2017

Annales Societatis Geologorum Poloniae, 2020

Upper Cretaceous to lower Palaeogene carbonate and siliciclastic deposits that crop out widely in... more Upper Cretaceous to lower Palaeogene carbonate and siliciclastic deposits that crop out widely in the Haymana and Polatlı districts (Ankara Province) of the Haymana Basin (Central Anatolia) are rich in larger benthic foraminifera, various macrofossils and ichnofossils. The ichnofossils of the Haymana and Yeşilyurt formations were studied at five localities. The Upper Cretaceous siliciclastics of the Haymana Formation contain moderately diverse trace fossils, belonging to the deep-sea Nereites ichnofacies. The Paleocene siliciclastic and carbonate deposits of the Yeşilyurt Formation comprise similar trace fossils, which do not show significant changes in comparison to the Haymana Formation. This indicates that the K-Pg boundary extinction event did not affect the ichnofauna with any longer consequences. The Upper Cretaceous coarser, siliciclastic deposits of the Haymana and Beyobası formations are rich in shallow-marine, larger benthic foraminifera, including species of Orbitoides, Omphalocyclus, Siderolites, Hellenocyclina, and Loftusia, whereas fine siliciclastic deposits contain abundant planktonic, open-marine foraminifera, such as Globotruncana and Heterohelix. Palaeogene siliciclastic to carbonate deposits of the Kartal, Yeşilyurt and Çaldağ formations are rich in the larger, benthic foraminifera Nummulites, Discocyclina, Assilina and Alveolina. The larger foraminifers have been redeposited from nearby, shallow-marine parts of the basin.

Palaeoworld, 2021

Abstract Bioeroded gastropod, bivalve and coral specimens (n = 570) were collected from the Jazan... more Abstract Bioeroded gastropod, bivalve and coral specimens (n = 570) were collected from the Jazan area, Saudi Red Sea coast, from which 22 ichnospecies of 8 ichnogenera were identified and illustrated. These traces were produced by clionid sponges (Entobia geometrica, E. ovula, E. cf. goniodes, E. cretacea, E. laquea, E. cf. paradoxa and E. isp.), duraphagous drillers (Oichnus ovalis, O. paraboloides, O. simplex and O. isp.), endolithic bivalves (Gastrochaenolites cf. dijugus, G. lapidicus, G. torpedo and G. isp.), polychaete annelids (Caulostrepsis taeniola, C. isp., Maeandropolydora sulcans, M. isp. and ?Trypanites isp.), acorn barnacles (Rogerella isp.), and vermetid gastropods (Renichnus isp.). The seashells act as hard substrate for colonization by serpulid worm, bivalves, bryozoans, and barnacles. Ichnogenus Entobia was most abundant (56.1%), followed by Gastrochaenolites (25.4%), Caulostrepsis (5.3%), Trypanites (4.2%), Maeandropolydora (3.2%), Oichnus (2.8%), Renichnus (1.9%), and Rogerella (1.0%). Oichnus occurred on the thin-shelled and smooth molluscs, while most Gastrochaenolites borings were found in the larger and thicker seashells as a suitable substrate for the settlement of polychaetes, lithophages, naticids, mytilids, and vermetids. Presence of annelid traces among radial ribs and at the siphonal areas of bivalves is indicative of nutrient capturing from water flow during the lifetime of these bivalves, within a shallow, high energy marine environment, where disarticulation, fragmentation, and abrasion of the seashells were abundantly observed.

Bulletin of the mineral research and exploration, 2008

Acta Geologica Polonica, 2018

The Telbesmi Formation, at the northern margin of the Arabian Plate, Turkey, is composed of alter... more The Telbesmi Formation, at the northern margin of the Arabian Plate, Turkey, is composed of alternating darkbrown, pinky-brown fluvial arkosic sandstone/mudstones with thin-bedded cherty limestones and channel conglomerates. The formation contains rare and poorly diversified trace fossils. The siltstone/sandstone beds of levels 1 and 2 of the formation yielded, however, a moderately diverse assemblage composed of: Cochlichnus isp., Palaeophycus isp., Planolites beverleyensis , Teichichnus isp. and ? Treptichnus rectangularis . This assemblage, made up of traces left by deposit feeding organisms, represents the Scoyenia ichnofacies. Treptichnus rectangularis and Palaeophycus isp., of the assemblage, can be considered markers for the base of the Cambrian in southeast Turkey.

The Late Eocene deep marine fan sequence exposed in the northeast of the Saros Bay and around Kor... more The Late Eocene deep marine fan sequence exposed in the northeast of the Saros Bay and around Korudað, Keþan, Yenimuhacir regions consists of several facies associations such as middle and outer fan, slope, prodelta. From the study area, as a part of the observations, 4 measured sections involving Korudað, Keþan, Yenimuhacir Formations were taken and the mid and outer fan facies association deposits were found to be more common than the others. The middle fan association was divided into two sub-associations: distribution channels and interchannel areas. 19 ichnogenus were identified in the deep sea fan deposits. From these ichnogenus: Ophiomorpha isp, Ophiomorpha annulata, Ophiomorpha rudis, Thalassinoides isp, Planolites isp, Halopoa annu- lata, Rutichnius isp, Chondrites isp, Scolicia vertebralis, Scolicia strozzii, Scolicia prisca, Scolicia plana, Nereites irregularis, Helminthoidichnites isp, Helminthopsis isp, Cosmorhaphe isp, and Paleodictyon strozzi helped to dis- tinguish t...

Bulletin of the mineral research and exploration, 2003

In this study, the trace fossils in the Lower-Middle Miocene turbiditic Cingoz formation cropping... more In this study, the trace fossils in the Lower-Middle Miocene turbiditic Cingoz formation cropping out around the Karaisali - Catalan - Egner regions have been examined for the first time. The trace fossils occur in a sequence, identified as submarine fan deposits. Based on their morphological characteristics, nineteen trace fos- sils have been identified; eleven of them are ichnospecies and eighteen ichnogenus.

Annales Societatis Geologorum Poloniae, 2002

Wzgledne zmiany poziomu morza zapisane w drązeniach z miocenskiego wybrzeza skalistego Basenu Mut... more Wzgledne zmiany poziomu morza zapisane w drązeniach z miocenskiego wybrzeza skalistego Basenu Mut w poludniowej Turcji Cretaceous limestones from the basement o f the Neogene Mut Basin are strongly sculptured by borings, including mainly clionid sponge borings Entobia ispp., bivalve borings Gastrochaenolites torpedo and G. lapidicus, the polychaete boring Caulostrepsis taeniola and Meandropolydora isp. The borings are replaced subsequently; as a rule the succession begins with C. taeniola and terminates with Entobia ispp. The discussed boring producers display various tolerance for light, energy and depth conditions, hence their succession may reflect environmental changes, related to marine transgression, proceeded upon rocky coast area. Since such a coast could be devoid of sedimentation for a long time, the possible reconstruction o f relative sea-level change may be inferred exclusively from nonsedimentological criteria i.e. from the succession of endolithic borings. Therefore t...

Skamienialości śladowe z miocenskich utworow otoczenia stozka glebokomorskiego z Formacji Cignoz ... more Skamienialości śladowe z miocenskich utworow otoczenia stozka glebokomorskiego z Formacji Cignoz w Poludniowej Turcji Fan fringe deposits of deep-sea fans are characterised by the Nereites ichnofacies, but in the Miocene Cingoz Formation in southern Turkey they contain 17 ichnospecies typical of the Nereites, Skolithos and Criiziana ichnofacies, including vertical “shallow-water” horn-like forms and Ophiomorpha rudis. Tracemakers of Ophiomorpha rudis have been probably imported by stronger turbidity currents from the inner part of deep-sea fan or occured as a result of gradual colonisation of fan fringe deposits. Similar trace-fossils occurs in related facies of the coeval Mamoso-arenacea Formation in the Northern Apennines. Comparisons with other Cretaceous-Neogene flysch formations show that ichnoassemblages of fan fringe facies are very diverse in general. Ichnofacja Nereites charakteryzuje utwory otoczenia stozka glebokomorskiego, jednak w utworach otoczenia stozka miocenskiej f...

In this study, the trace fossils in the Lower-Middle Miocene turbiditic Cingöz formation cropping... more In this study, the trace fossils in the Lower-Middle Miocene turbiditic Cingöz formation cropping out around the Karaisalı-Catalan-Eğner regions have been examined for the first time. The trace fossils occur in a sequence, identified as submarine fan deposits. Based on their morphological characteristics, nineteen trace fossils have been identified; eleven of them are ichnospecies and eighteen ichnogenus.

TURKISH JOURNAL OF EARTH SCIENCES, 2021

Herein, 20 ichnospecies belonging to 8 ichnogenera were identified in bivalves, gastropods, and c... more Herein, 20 ichnospecies belonging to 8 ichnogenera were identified in bivalves, gastropods, and corals (n = 701) from the Late Pleistocene coral reef along the Red Sea coast, northwest Saudi Arabia. The trace fossils were produced by clionid sponges (47.39%), endolithic bivalves (42.17%), polychaete annelids (5.42%), vermetid gastropods (3.81%), and acrothoracican barnacles (1.21%). The recognized ichnotaxa were Entobia geometrica, E. ovula, E. cf. goniodes, E. cf. retiformis, E. cretacea, Entobia isp., Gastrochaenolites torpedo, G. lapidicus, G. cf. dijugus, Gastrochaenolites isp., Oichnus paraboloides, O. simplex, Oichnus isp., Caulostrepsis taeniola, Caulostrepsis isp., Maeandropolydora cf. sulcans, Maeandropolydora isp., Renichnus isp., Centrichnus isp., and cf. Rogerella isp., Most bivalves and gastropods contain Entobia rather than Gastrochaenolites, which is commonly found in the larger and thicker corals. The content of the trace fossils indicated an Entobia ichnofacies formed in the coral reef during transgression. The habitat conditions changed gradually, from well-oxygenated, shallow, high-energy back-reef and reef crest bioeroding polychaetes and bivalves, to deep, low-energy reef slope dominated by boring sponges.

TURKISH JOURNAL OF EARTH SCIENCES, 2019

Introduction Bioerosion described as all types of biological erosion by Neumann (1966) is formed ... more Introduction Bioerosion described as all types of biological erosion by Neumann (1966) is formed by living organisms in hard substrate including lithic and woody strata (Bromley, 1992). It generally comprises (i) internal microbioerosion by boring cyanobacteria, algae, and fungi, (ii) internal macrobioerosion by boring sponges, worms, and bivalves, and (iii) external bioerosion by grazing gastropods, vechinin, and fish (e.g., Glynn, 1997; Tribollet et al., 2011). It may be in different sizes from micrometers to centimeters or more (

International Geology Review, 2018

Western Anatolia is a complex assemblage of terranes, including the Sakarya Terrane and the Tauri... more Western Anatolia is a complex assemblage of terranes, including the Sakarya Terrane and the Tauride-Anatolide Platform that collided during the late Cretaceous and Palaeogene (80-25 Ma) after the closure of the Izmir-Ankara Ocean. Determining the precise timing at which this ocean closed is particularly important to test kinematic reconstructions and geodynamic models of the Mediterranean region, and the chronology of suturing and its mechanisms remain controversial. Here, we document the Cretaceous-Eocene sedimentary history of the Central Sakarya Basin, along the northern margin of the Neotethys Ocean, via various approaches including biostratigraphy, geochronology, and sedimentology. Two high-resolution sections from the Central Sakarya Basin show that pelagic carbonate sedimentation shifted to rapid siliciclastic deposition in the early Campanian (~79.6 Ma), interpreted to be a result of the build-up of the accretionary prism at the southern margin of the Sakarya Terrane. Rapid onset of deltaic progradation and an increase in accumulation rates in the late Danian (~61 Ma), as well as a local angular unconformity are attributed to the onset of collision between the Sakarya Terrane and the Tauride-Anatolide Platform. Thus, our results indicate that though deformation of the subduction margin in Western Anatolia started as early as the Campanian, the closure of the İzmir-Ankara Ocean was only achieved by the early Palaeocene.

Bulletin Of The Mineral Research and Exploration, 2016

In this study, trace fossils of the Ceylan Formation (Late Eocene) in the area NW of Fındıklı vil... more In this study, trace fossils of the Ceylan Formation (Late Eocene) in the area NW of Fındıklı village and on the coast of the Ece Bay the Gelibolu Peninsula are identified for the first time. They occur in gray siltstones and mudstones intercalated with thin-bedded, parallel and ripple laminated sandstones, which were deposited on a basin plain in proximilt of a slopes in the Thrace Basin. The Late Eocene Ceylan Formation includes pre-depositionl (Belorhaphe zickzack, Desmograpton isp., Helicolithus ramosus, Helminthorhaphe flexuosa, Paleodictyon majus, Paleodictyon minimum, Paleodictyon strozzii, Saerichnites isp., Urohelminthoida appendiculata) and postdepositional (Phycosiphon incertum, Spongeliomorpha oraviense, Trichichnus isp., Planolites isp., Ophiomorpha isp., Ophiomorpha annulata, Scolicia isp., Scolicia prisca, and Thalassinoides isp.) trace fossils. This trace fossil assemblage is typical of the Nereites ichnofacies (Paleodictyon ichnosubfacies), which characterize deep-sea, thin bedded turbididitic sediments oxygenated sea floor.

Maden Tetkik ve Arama Dergisi, 2016

Th e Güneyce Formation is well exposed in the Lake District of southwestern Turkey. It was deposi... more Th e Güneyce Formation is well exposed in the Lake District of southwestern Turkey. It was deposited in the early Miocene in the Neotethys ocean and contains a large variety of trace fossils. Th e following ichnotaxa were recognized: