Mehmet Serkan Akkiraz

Mehmet Serkan Akkiraz
Dumlupinar Üniversitesi · Jeoloji Bölümü

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40
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Publications

Publications (40)
Article
This study presents the stratigraphy, biostratigraphy and palaeoecology of a 420- m thick sequence of the Mamuca Formation (Dümrek Basin, Eskişehir, Turkey). The age for the strata of the Mamuca Formation in the Çakıroğlu Creek section is narrowed to late Ypresian-Lutetian (early-middle Eocene) by benthic foraminifera (Nummulites planulatus, N. bur...
Article
This study presents the micropalaeontological data (palynomorphs and ostracods) including index taxa to assign a precise age, and the palaeoecological evolution of the Aspiras Basin, south‐east Kastamonu, northern Anatolia. The succession may informally be divided into a lower part including rich lignites interbedded with fine‐grained sediments and...
Article
In this study comprehensive palaeofloristic data of lower Miocene deposits from the Soma Basin, western Anatolia is presented considering the stratigraphical concept. The sediments of the basin, derived from outcrop sections, were deposited in the terrestrial environment. The basin includes three different successions: lower and middle lignite succ...
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Bu çalışma Kureyşler Vadisi civarında (Kütahya Batısı) jeolojik/jeomorfolojik yapıyı belirlemeyi ve bunu civarda yaşamış eski insan uygarlıkları ile ilişkilendirmeyi amaçlamaktadır. Jeomorfolojik açıdan inceleme alanında Miyo-Pliyosen kireçtaşları üzerinde beş farklı seviyede gelişmiş kaya taraçaları tanınıp haritalanmıştır. Yüzey tarihleme çalışma...
Article
Sedimentological and paleoclimatological data from a fluvial infill retrieved from a series of cores taken across Kureyşler Valley, Kütahya, western Turkey, are compared alongside evidence for an almost unbroken record of human occupation in the area since Neolithic times. Recent salvage excavations in the valley exposed settlement remains from the...
Article
As one of the rare terrestrial archive with continuous sedimentation back to almost 1 Ma in Anatolia, the Eskişehir Graben was investigated in outcrops and cores by multi-proxy analysis regarding chronology and paleoclimatology. The present study comprises significant implications for both the impact of climate changes on fluvial systems in the tim...
Article
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The results of palaeontological (palynological and mollusc) and sedimentological analyses of the lower Miocene deposits from the Bingöl minibasin, a part of the Sivas Basin, are exhibited to define the vertical shifts in sedimentation environments and plant covers, linking to eustasy. The presence of index species Corbulomya (Lentidium) aquitanica...
Article
Radiometric and palynological data of the Upper Oligocene-Lower Miocene Soma Formation from the Kalkım-Gönen Basin yield new results related to age and palynological contents. In this study, Upper Oligocene strata from the Danişment and Linfa areas and Lower Miocene strata from the Bengiler area were sampled palynologically and for radiometric dati...
Article
This study examines the development and sedimentology of Çan-Etili lignite basin in Biga Peninsula (NW Turkey) along with the palynologic and petrographic properties of the coals in this region. The Çan-Etili lignite basin discordantly overlies Oligocene-aged Çan volcanics. The basin consists of caldera type sedimentation developed by the combined...
Article
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In this study, coal samples from two diffrent coal zones located close to each other were examined. Thy occur in the Late Oligocene Osmancık and Miocene Gazhanedere formations in the Gelibolu peninsula, in the SW part of the Thace Basin (NW Turkey). Ths paper focuses on the organic-petrographic composition and depositional conditions of the two coa...
Article
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In this paper we present the first palynomorph and mollusc assemblages from the sediments in three different sections. From east to west, these are the Şevketiye (northern Biga Peninsula), the Tayfur (Gelibolu Peninsula) and the Kuzu harbour (Gökçeada) (parts of the Danişmen Formation) sections in the south and south-western side of the Thrace Ba...
Article
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The integration of sedimentological, palynological and palaeontological data in three different outcrops in SW Turkey provides a clearer understanding of the palaeoenvironments in an area between the Cardak-Dazkiri Basin and the Isparta region during the Middle Late Eocene. in this study, the Cardak-Dazkiri (Bascesme Formation), Burdur (Varsakyayla...
Article
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Lower-Middle Miocene successions from Kutahya province (Seyitomer and Tuncbilek sub-basins) were analyzed to reconstruct the palaeoclimate and vegetation of the period. A rich coniferous forest formed the dominant components among sporomorphs and consisted mainly of undeterminable Pinaceae, Pinus haploxylon type, Pinus diploxylon type, Picea, Cedru...
Article
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Lower-Middle Miocene successions from Kütahya province (Seyitömer and Tunçbilek sub-basins) were analyzed to reconstruct the palaeoclimate and vegetation of the period. A rich coniferous forest formed the dominant components among sporomorphs and consisted mainly of undeterminable Pinaceae, Pinus haploxylon type, Pinus diploxylon type, Picea, Cedru...
Article
Full-text available
Lower–Middle Miocene succession from the Șahinali coalfield (SW Turkey) was analyzed to reconstruct climate and veg-etation. The sediments mainly represent a lacustrine facies and consist of a mudstone-marl dominated succession, includ-ing limited coarse-grained clastics. Results of microfloral and published macrofloral records have been considered...
Article
The Kocaçay Basin (KB) is a key area in western Anatolia – a well-known extended terrane where regional segmentation has received limited attention – for investigating strike-slip faults kinematically linked to detachment faults. In this paper, we present results of an integrated sedimentologic, stratigraphic, and structural study of Miocene alluvi...
Article
In the present paper, we have analyzed thirty-five palynofloras covering the time span from the Early Miocene (Aquitanian) to the Late Miocene (middle Tortonian) in Turkey. The results obtained are presented in tables and maps showing temporal palaeoprecipitation values. The mean annual precipitation (MAP) exceeds 1200 mm during the Aquitanian and...
Article
This study describes the stratigraphic and palaeoenvironmental significance of the Lower-“middle” Oligocene sediments based on the fauna from the Delikarkası Formation and the microflora from the İncesu Formation of the İncesu area (northern part of the western Taurides, Isparta province, Turkey). In the area, the Oligocene sediments show a regress...
Article
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The basement rocks located in the central part of the southern edge of the Kucuk Menderes Graben, around Akcasehir-Tire are composed of marbles, schists, gneisses and metagabbros of the Odemis-Kiraz submassif of the Menderes Massif, and schists, marbles and meta-olistostromes of the Cycladic Complex. The basement is unconformably overlain by Neogen...
Article
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ivril doğusu'nda (Denizli) yüzlek veren Rupeliyen–erken Şattiyen (Oligosen) yaşlı Tokça Formasyonu'nun Paleoekolojisi: Sayısal iklimsel karşılaştırmalar ÖZ Bu çalışmada, Çardak–Tokça havzasında yüzlek veren Tokça Formasyonu'nun palinolojik ve foraminifer içeriklerine dayalı paleoiklimsel, paleoortamsal ve paleoekolojik yorumlamalar yapılmıştır. Tok...
Article
Full-text available
Foraminiferal and palynological data recovered from the Kavak Formation of the Burdur area, paints out an Early Miocene (Aquitanian) age, based on the co-occurrence of stratigraphic markers such as Lepidocyclina cf. dilatata, Longapertites retip-iliatus, Plicatopollis plicatus and Plicatollis hungaricus. The sediments were deposited in a marginally...
Article
Full-text available
Abstract: In this study, the lignite-bearing Yoncalı formation between Yozgat and Sorgun, in central Anatolia has been palynologically examined. Based on 37 outcrop samples, quantitative palynological studies recognized 64 genera and 136 palynoflora species in the palynological assemblage, which indicated a Middle–?Late Eocene age. This paper also...
Article
Neogene basins are widespread in Turkey and contain important lignite deposits. In this study, we reconstruct quantitatively the Late Oligocene–Miocene climate evolution in western and central Anatolia by applying the Coexistence Approach to the palynofloras obtained from the published literatures and ongoing studies.The Coexistence Approach result...
Data
Neogene basins are widespread in Turkey and contain important lignite deposits. In this study, we reconstruct quantitatively the Late Oligocene-Miocene climate evolution in western and central Anatolia by applying the Coexistence Approach to the palynoflora. The obtained results are compared with the data derived from the published and ongoing stud...
Article
Full-text available
This study explains the stratigraphical and palaeoenvironmental significance of Bartonian-Priabonian (Middle-Late Eocene) fossils, the fauna and flora obtained from the Ba şçeşme formation of the Çardak-Tokça basin (western Anatolia). The studied sequence is an outcrop from the Başçeşme formation, deposited in a shallow-marine to coastal environmen...
Article
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In this study, the lignite bearing sediments of Çardak–Tokça basin exposed in southwest Anatolia, were palynologically examined. A well preserved and diverse palynomorph assemblage indicating an Early Oligocene age was recovered from the Hayrettin and Tokça formations. The palynomorph assemblage is dominated by Pinus, Sparganiaceae, Juglandaceae an...
Article
Full-text available
This study is carried out on the settings of Holocene at eastern Gulf of ̇Izmit, Adapazari, Sakarya Delta and its vicinity, and based on 86 samples collected from the boreholes. The pollen diagram, based on the data from the boreholes drilled at Adapazari and its vicinity, suggested that high herbaceous pollen percentages of particularly Chenopodia...
Article
Z Bu çal›flma; ‹zmit Körfezi'nin do¤usu, Adapazar›, Sakarya Deltas› ve çevrelerinde Holosen yafll› çökeller içinde gerçeklefltirilmifl olup, karotlu sondajlardan derlenen 86 örne¤in ayr›nt›l› incelenmesine dayanmaktad›r. Adapaza-r› çevresi sondajlar›ndan elde edilen polen diyagram›nda Erken Holosen (yaklafl›k olarak 11.300 BP y›l)'de özel-likle Che...
Article
Z Bu çal›flma; ‹zmit Körfezi'nin do¤usu, Adapazar›, Sakarya Deltas› ve çevrelerinde Holosen yafll› çökeller içinde gerçeklefltirilmifl olup, karotlu sondajlardan derlenen 86 örne¤in ayr›nt›l› incelenmesine dayanmaktad›r. Adapaza-r› çevresi sondajlar›ndan elde edilen polen diyagram›nda Erken Holosen (yaklafl›k olarak 11.300 BP y›l)'de özel-likle Che...
Article
Full-text available
The main objective of this study is to determine the biostratigraphical significance of the Early Oligocene fauna and flora from the İncesu Formation located on the northern part of Isparta. Additionally, the quantitative Oligocene climate evolution of the İncesu Formation on the basis of palynological assemblage has also been aimed.

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NECLIME is an open international network of scientists working on Cenozoic climate evolution and related changes of continental ecosystems. During the past 65 million years of Earth history, globally warmer-then-present conditions prevailed in a world with almost modern paleogeography. These timespans represent promising case studies for anticipated future scenarios. Within the NECLIME network, we aim to combine data on past climate change and its environmental impact for large-scale reconstructions. NECLIME research activities comprise paleoclimate reconstructions, including atmospheric CO₂ and ecosystem analysis using multiple quantitative methods on various primarily continental proxies (plants; vertebrates; invertebrates; geochemistry and geological proxies). Complementing model studies are employed to assess connections and processes driving ocean, atmosphere and biosphere at global and regional scales. NECLIME was established in 1999 with the aim to understand Neogene trends across Eurasia. This basic idea quickly and constantly expanded to a global interest and a wider stratigaphical frame. The steadily growing NECLIME network with currently around 140 members in 34 countries is coordinated by a team of researchers and an advisory board. NECLIME holds annual conferences and workshops and administers working groups bringing forward scientific exchange, joint projects, and the integration of research data. For more information go to www.neclime.de