Mine Sezgül Kayseri Özer - Academia.edu (original) (raw)
Papers by Mine Sezgül Kayseri Özer
Palaeobiodiversity and Palaeoenvironments
International Journal of Coal Geology
The Şarkikaraağaç coalfield is located in the north-western part of the Lake Beyşehir Basin, whic... more The Şarkikaraağaç coalfield is located in the north-western part of the Lake Beyşehir Basin, which is the most significant graben area in the eastern flank of Isparta Angle, and hosts a 300-Mt coal resource. This study focuses on the first palaeoenvironmental and palaeoclimatic reconstruction of Pliocene and early Pleistocene coal-bearing sequences cored in the two coal exploration wells (SK-1 and SK-2) using coal petrography, mineralogy, faunal (ostracod and mollusk), and floral (palynology and diatom) data from four coal seams (from bottom to top: B, A, X-1, and X-0) with the variable total thickness (1 to 7 m). According to the palynological data, warm and humid climate conditions prevailed during the early Pliocene, and the precursor peats of seams A and B were mainly accumulated under limno-telmatic conditions, with high contributions of herbaceous peat-forming plants. Nevertheless, the co-occurrence of syngenetic carbonate minerals and framboidal pyrites along with calcareous fossil and diatom remains implies neutral to weakly alkaline conditions within palaeomires of these seams. Furthermore, ostracod and gastropod fauna from these seams might imply nutrient-rich shallow water conditions and spring support (e.g., karstic aquifer) into palaeomires. Thus, algal activity within the palaeomires was presumably high, and freshwater algae and diatoms were commonly identified in these seams.With the development of increased uplift ratio of central Taurides and climatic changes towards to late stages of Pliocene and particularly early Pleistocene, the common peat-forming plants within palaeomires and vegetation in the surrounding areas were changed. The increased precipitation caused an elevation of water levels in the study area; hence, the precursor peats of the seam X-1 were accumulated under wet forest mire conditions. This increase also explains the existence of ostracod and mollusk fauna related to river and spring support underlying sequences of the seam X-1. With the ceasing of accumulation of peat of the seam X-1, the climate became drier, and very shallow water conditions have been common. The development of spring support and relatively high precipitation in a short period of time allowed for final peat accumulation (seam X-0) during the early Pleistocene. Nevertheless, this period was followed by the development of relatively colder conditions in the study area, and cold small water conditions were developed during the end of the early Pleistocene. Furthermore, microthermic vegetation was common in the vicinity of the palaeomires during the early Pleistocene. Overall, the peat accumulation and water level of lakes in the study area seem to be controlled by climatic oscillations and uplift of margins of the Lake Beyşehir Basin during the Pliocene to early Pleistocene.
EGU General Assembly Conference Abstracts, Apr 1, 2018
Geothermal Systems and Energy Resources, 2014
This study covers the first results obtained from the examination of samples taken from the sea o... more This study covers the first results obtained from the examination of samples taken from the sea on the TAE-II route in the northwest of Antarctic Peninsula. The study was conducted in 8 localities and samples were taken from the muds of the seabottom at depths ranging from-20 to-60 m, by using grab method. Sediment samples consist of greenish gray high water content silty clay (slime) with black zones and sandy silty clay lithologies containing blackish, greenish gray colored, less watery fine sandy silt and brownish gray colored fine gravel grains. It is remarkable that the samples are rich in organic content and smelly. The samples were transferred to the relevant experts and examined for fauna, flora and palinomorph communities and geochemical properties. As a result of the examination, mollusc (gastropod, bivalve), benthic foraminifera, ostracod, diatom species were found; But, no evidence was found regarding planktic foraminifer, nannofossil and palinomorph communities. Accordi...
Türkiye Jeoloji Bülteni, 2010
Palynofloras of the Kocaçay and Cumaovasi basins in western Turkey that belong to a time-span fro... more Palynofloras of the Kocaçay and Cumaovasi basins in western Turkey that belong to a time-span from the late Early to late Middle Miocene (the late Burdigalian-Serravallian) are studied and compared with published palynofloras of Europe and Turkey. Palynological data and numerical climatic results obtained by the coexistence approach indicate palaeoclimate changed from warm subtropical to temperate during the late Burdigalian-Serravallian. Moreover, the palaeoclimates of the Kocacay and Cumaovasi basins are compared with continental palaeoclimatic records of coal-bearing sediments in western Turkey and current temperatures in the Izmir region. According to this comparison, palaeoclimatic results of these basins and other localities in western Turkey show a distinct difference as a result of orographic change. The palaeovegetation in the Kocaçay and Cumaovasi basins during the studied time-span was affected by palaeotopography and palaeoclimate. In these basins mixed mesophytic, conif...
Enterprise Resource Planning (ERP) is a set of applications that automate various processes withi... more Enterprise Resource Planning (ERP) is a set of applications that automate various processes within the organization and help organizations to handle tasks such as order processing and production scheduling, and to make financial management process more efficiently and effectively. However, the ERP system has its challenges in terms of the use and operation of the system, both to individuals and organizations. The objective of this study is to find out the impact of the ERP system used on the performance of individuals and organizations in the public sector. The method used in this study is a single case study. The respondents involved are accountants and auditors working in the finance department at the Melaka Historic City Council (MBMB). The results of the study show that ERP provides various impacts on individuals such as time savings, increased productivity, and customer relationships. ERP also saves the organizational costs, improves employee communication, and increases organizational productivity.
The Miocene is the last warm episode in Earth history, and this episode was well recorded in Turk... more The Miocene is the last warm episode in Earth history, and this episode was well recorded in Turkey as shown by plant distribution and inferred numerical temperature values. In this study, Ören-Kultak, Hüssamlar and Karacaagac palynofloras from western Turkey, which are characterized by the thermophilous plants (Engelhardia, Sapotaceae, Cyrillaceae, Avicennia, Arecaceae, Palmae), are described. Age determinations of these palynofloras (middle Burdigalian-Langhian) are strengthened by the mammalian fossil record (MN4-5) and strontium isotope results. Palaeoclimate is humid and warm subtropical during the middle Burdigalian-Langhian time interval in Europe and Turkey. However, temperature difference has been observed between Europe and Turkey during this time interval and it could be explained by the palaeogeographic position of countries. Despite some discrepancies in the climatic values and palaeovegetation groups, warm climatic conditions are recorded, based on the palynofloras, in...
Environmental Earth Sciences, 2021
The lacustrine sediments and geomorphological data from the Bor Plain situated at elevations betw... more The lacustrine sediments and geomorphological data from the Bor Plain situated at elevations between 1050 and 1100 m in southern Central Anatolia provide record between 9800 and 6700 yr cal BP of climate changes and events. The main aim of this study is to determine the relationship between the location of Neolithic sites and the deposition and recession phases of the lake during Holocene. The geomorphological history of the Bor Plain and palynological results allows us to reconstruct the relationship between the Holocene environment and reconstruction of Neolithic settlements within a spatially well-defined lacustrine landscape of ~ 600 km2. A 75 ± 13 ka aged terrace, consisting almost entirely of calcite and situated about 76 m above the plain floor, indicates that the plain was covered with a paleolake in the transition from MIS 5 to MIS 4. Considering the low total organic carbon and the high CaCO3 clay values, we conclude that the lake slowly receded in 9867 ± 39 cal BP. Howeve...
The calcareous tufas of Sarıkavak located in the northern part of NE-SW trending Acıgöl Graben in... more The calcareous tufas of Sarıkavak located in the northern part of NE-SW trending Acıgöl Graben in SW-Turkey are investigated in detail. For this aim, various analyses (stable isotopes, U/Th dating, palynology) have been carried out on samples obtained from both outcrops and drilling logs in and surrounding Sarıkavak Village. U/Th dating shows that these carbonates precipitated from 400 ka up to 80 ka. Preliminary pollen data, document climatic variability between MIS 11 and MIS 8 in the studied area.
Review of Palaeobotany and Palynology, 2021
Quaternary International, 2020
Abstract Non-marine carbonates such as travertine, tufa and speleothem are quite sensitive for cl... more Abstract Non-marine carbonates such as travertine, tufa and speleothem are quite sensitive for climatic fluctuations. This study presents the new dating and the first pollen records from Afyon (Sarikavak) tufas, SW-Turkey, together with lithofacies descriptions, geochemical and petrographic results obtained from drilling cores (SL-2, SL-6 and SL-7). The data extensively provides insight into palaeoenvironmental and palaeoclimatic changes during the Middle-Late Pleistocene period. According to core samples, these fluvial tufa occurrences formed in high-gradient and stepped fluvial conditions have been defined as barrage-dammed and terraced-slope systems in the investigated area. The depositional lithofacies are moss tufa included macrophytes, bryophytes and vertical stems, phytoclastic tufa, peloidal tufa, micritic tufa, microbial tufa, intraclastic tufa, extra-formational tufa, lime-muddy clay and paleosol level, in respectively. The new U/Th radiometric dating and stable isotopes are evaluated together with previously published results. In regard to new radiometric data, tufa deposits occurred predominantly during the Marine Isotopic Stages, at 313.3 ± 21 (MIS 9), 295.8 ± 63 (MIS 8-9), 230.8 ± 42 (MIS 7d-e), 228.8 ± 12 (MIS 7d), 215.7 ± 17 (MIS 7c) and 188.2 ± 16 (MIS 6-7a) ka, respectively. The climatic changes occurring between glacial and interglacial periods (such as during the Middle –Late Pleistocene) might probably influenced the precipitation of tufas in the area. In addition, the less negative and the more positive carbon isotopic values (between −0.8 and + 1.3‰ V-PDB) could be related to the progressive downstream CO2 degassing from host rocks, enhanced by high-velocity current conditions, changes in the soil-CO2 contribution and photosynthesis. The changes of δ18O values (between −8.3 and −10.1‰ V-PDB) are most probably related to variable effects of evaporation in depositional environment. Palynofloral data, gives important clues about the paleovegetation and paleoclimate of the region. This field survey has been conducted the first time in this area. Both carbon values and palynological findings show that drought conditions were dominantly present in the Pleistocene period, but in some processes drought conditions decreased depending on the amount of rainfall. The increasing amount of gymnosperm pollens is more likely to appear in more humid conditions due to the decreasing of drought condition in this time interval.
TURKISH JOURNAL OF EARTH SCIENCES, 2019
Introduction Extensional basins that develop after the closure of an ocean have a key role in und... more Introduction Extensional basins that develop after the closure of an ocean have a key role in understanding the spatial and temporal evolution from compressional to extensional tectonics. The basins in southwest Turkey are optimal places for studying postcollision events following the closure of the Neotethys Ocean. The development of sedimentary basins, such as the Kale-Tavas, Yatağan, and Ören basins, preserves the evidence of the transition from compression to extension of the regional tectonism (Seyitoğlu et al., 2004, Sözbilir, 2005). These basins in SW Turkey started to develop immediately after the emplacement of the Lycian Nappes over the Menderes Massif (Gürer and Yılmaz, 2002). The Menderes Massif and the Lycian Nappes are the main tectonic belts of southwest Turkey in the eastern Mediterranean. The Lycian Nappes were emplaced on the Menderes Massif during the Late Cretaceous-Eocene, related to the closure of the northern Neotethys Ocean
TURKISH JOURNAL OF EARTH SCIENCES, 2017
Özer et al., 2017), and these palynological studies were recorded from West and Central Anatolia.... more Özer et al., 2017), and these palynological studies were recorded from West and Central Anatolia. Contrary to this, the Paleogene micro-and macrofloras from East Anatolia and surrounding countries are still poorly documented, mainly due to their occasional occurrences and insufficient interest of the paleobotany community in their records (Sancay et al., 2006). In this study, palynofloral data from the Kağızman-Kötek and Kömürlü areas are given, together with a summary of paleovegetational and paleoclimatic differences between West, Central, and East Anatolia. Studies on the Paleogene macrofloras from several regions in Central and East Europe demonstrated that their bearing for understanding macrofloral diversity and for paleoenvironmental and paleoclimatic reconstruction is of considerable scientific interest (e.g., Kvaček and
Palaeobiodiversity and Palaeoenvironments
International Journal of Coal Geology
The Şarkikaraağaç coalfield is located in the north-western part of the Lake Beyşehir Basin, whic... more The Şarkikaraağaç coalfield is located in the north-western part of the Lake Beyşehir Basin, which is the most significant graben area in the eastern flank of Isparta Angle, and hosts a 300-Mt coal resource. This study focuses on the first palaeoenvironmental and palaeoclimatic reconstruction of Pliocene and early Pleistocene coal-bearing sequences cored in the two coal exploration wells (SK-1 and SK-2) using coal petrography, mineralogy, faunal (ostracod and mollusk), and floral (palynology and diatom) data from four coal seams (from bottom to top: B, A, X-1, and X-0) with the variable total thickness (1 to 7 m). According to the palynological data, warm and humid climate conditions prevailed during the early Pliocene, and the precursor peats of seams A and B were mainly accumulated under limno-telmatic conditions, with high contributions of herbaceous peat-forming plants. Nevertheless, the co-occurrence of syngenetic carbonate minerals and framboidal pyrites along with calcareous fossil and diatom remains implies neutral to weakly alkaline conditions within palaeomires of these seams. Furthermore, ostracod and gastropod fauna from these seams might imply nutrient-rich shallow water conditions and spring support (e.g., karstic aquifer) into palaeomires. Thus, algal activity within the palaeomires was presumably high, and freshwater algae and diatoms were commonly identified in these seams.With the development of increased uplift ratio of central Taurides and climatic changes towards to late stages of Pliocene and particularly early Pleistocene, the common peat-forming plants within palaeomires and vegetation in the surrounding areas were changed. The increased precipitation caused an elevation of water levels in the study area; hence, the precursor peats of the seam X-1 were accumulated under wet forest mire conditions. This increase also explains the existence of ostracod and mollusk fauna related to river and spring support underlying sequences of the seam X-1. With the ceasing of accumulation of peat of the seam X-1, the climate became drier, and very shallow water conditions have been common. The development of spring support and relatively high precipitation in a short period of time allowed for final peat accumulation (seam X-0) during the early Pleistocene. Nevertheless, this period was followed by the development of relatively colder conditions in the study area, and cold small water conditions were developed during the end of the early Pleistocene. Furthermore, microthermic vegetation was common in the vicinity of the palaeomires during the early Pleistocene. Overall, the peat accumulation and water level of lakes in the study area seem to be controlled by climatic oscillations and uplift of margins of the Lake Beyşehir Basin during the Pliocene to early Pleistocene.
EGU General Assembly Conference Abstracts, Apr 1, 2018
Geothermal Systems and Energy Resources, 2014
This study covers the first results obtained from the examination of samples taken from the sea o... more This study covers the first results obtained from the examination of samples taken from the sea on the TAE-II route in the northwest of Antarctic Peninsula. The study was conducted in 8 localities and samples were taken from the muds of the seabottom at depths ranging from-20 to-60 m, by using grab method. Sediment samples consist of greenish gray high water content silty clay (slime) with black zones and sandy silty clay lithologies containing blackish, greenish gray colored, less watery fine sandy silt and brownish gray colored fine gravel grains. It is remarkable that the samples are rich in organic content and smelly. The samples were transferred to the relevant experts and examined for fauna, flora and palinomorph communities and geochemical properties. As a result of the examination, mollusc (gastropod, bivalve), benthic foraminifera, ostracod, diatom species were found; But, no evidence was found regarding planktic foraminifer, nannofossil and palinomorph communities. Accordi...
Türkiye Jeoloji Bülteni, 2010
Palynofloras of the Kocaçay and Cumaovasi basins in western Turkey that belong to a time-span fro... more Palynofloras of the Kocaçay and Cumaovasi basins in western Turkey that belong to a time-span from the late Early to late Middle Miocene (the late Burdigalian-Serravallian) are studied and compared with published palynofloras of Europe and Turkey. Palynological data and numerical climatic results obtained by the coexistence approach indicate palaeoclimate changed from warm subtropical to temperate during the late Burdigalian-Serravallian. Moreover, the palaeoclimates of the Kocacay and Cumaovasi basins are compared with continental palaeoclimatic records of coal-bearing sediments in western Turkey and current temperatures in the Izmir region. According to this comparison, palaeoclimatic results of these basins and other localities in western Turkey show a distinct difference as a result of orographic change. The palaeovegetation in the Kocaçay and Cumaovasi basins during the studied time-span was affected by palaeotopography and palaeoclimate. In these basins mixed mesophytic, conif...
Enterprise Resource Planning (ERP) is a set of applications that automate various processes withi... more Enterprise Resource Planning (ERP) is a set of applications that automate various processes within the organization and help organizations to handle tasks such as order processing and production scheduling, and to make financial management process more efficiently and effectively. However, the ERP system has its challenges in terms of the use and operation of the system, both to individuals and organizations. The objective of this study is to find out the impact of the ERP system used on the performance of individuals and organizations in the public sector. The method used in this study is a single case study. The respondents involved are accountants and auditors working in the finance department at the Melaka Historic City Council (MBMB). The results of the study show that ERP provides various impacts on individuals such as time savings, increased productivity, and customer relationships. ERP also saves the organizational costs, improves employee communication, and increases organizational productivity.
The Miocene is the last warm episode in Earth history, and this episode was well recorded in Turk... more The Miocene is the last warm episode in Earth history, and this episode was well recorded in Turkey as shown by plant distribution and inferred numerical temperature values. In this study, Ören-Kultak, Hüssamlar and Karacaagac palynofloras from western Turkey, which are characterized by the thermophilous plants (Engelhardia, Sapotaceae, Cyrillaceae, Avicennia, Arecaceae, Palmae), are described. Age determinations of these palynofloras (middle Burdigalian-Langhian) are strengthened by the mammalian fossil record (MN4-5) and strontium isotope results. Palaeoclimate is humid and warm subtropical during the middle Burdigalian-Langhian time interval in Europe and Turkey. However, temperature difference has been observed between Europe and Turkey during this time interval and it could be explained by the palaeogeographic position of countries. Despite some discrepancies in the climatic values and palaeovegetation groups, warm climatic conditions are recorded, based on the palynofloras, in...
Environmental Earth Sciences, 2021
The lacustrine sediments and geomorphological data from the Bor Plain situated at elevations betw... more The lacustrine sediments and geomorphological data from the Bor Plain situated at elevations between 1050 and 1100 m in southern Central Anatolia provide record between 9800 and 6700 yr cal BP of climate changes and events. The main aim of this study is to determine the relationship between the location of Neolithic sites and the deposition and recession phases of the lake during Holocene. The geomorphological history of the Bor Plain and palynological results allows us to reconstruct the relationship between the Holocene environment and reconstruction of Neolithic settlements within a spatially well-defined lacustrine landscape of ~ 600 km2. A 75 ± 13 ka aged terrace, consisting almost entirely of calcite and situated about 76 m above the plain floor, indicates that the plain was covered with a paleolake in the transition from MIS 5 to MIS 4. Considering the low total organic carbon and the high CaCO3 clay values, we conclude that the lake slowly receded in 9867 ± 39 cal BP. Howeve...
The calcareous tufas of Sarıkavak located in the northern part of NE-SW trending Acıgöl Graben in... more The calcareous tufas of Sarıkavak located in the northern part of NE-SW trending Acıgöl Graben in SW-Turkey are investigated in detail. For this aim, various analyses (stable isotopes, U/Th dating, palynology) have been carried out on samples obtained from both outcrops and drilling logs in and surrounding Sarıkavak Village. U/Th dating shows that these carbonates precipitated from 400 ka up to 80 ka. Preliminary pollen data, document climatic variability between MIS 11 and MIS 8 in the studied area.
Review of Palaeobotany and Palynology, 2021
Quaternary International, 2020
Abstract Non-marine carbonates such as travertine, tufa and speleothem are quite sensitive for cl... more Abstract Non-marine carbonates such as travertine, tufa and speleothem are quite sensitive for climatic fluctuations. This study presents the new dating and the first pollen records from Afyon (Sarikavak) tufas, SW-Turkey, together with lithofacies descriptions, geochemical and petrographic results obtained from drilling cores (SL-2, SL-6 and SL-7). The data extensively provides insight into palaeoenvironmental and palaeoclimatic changes during the Middle-Late Pleistocene period. According to core samples, these fluvial tufa occurrences formed in high-gradient and stepped fluvial conditions have been defined as barrage-dammed and terraced-slope systems in the investigated area. The depositional lithofacies are moss tufa included macrophytes, bryophytes and vertical stems, phytoclastic tufa, peloidal tufa, micritic tufa, microbial tufa, intraclastic tufa, extra-formational tufa, lime-muddy clay and paleosol level, in respectively. The new U/Th radiometric dating and stable isotopes are evaluated together with previously published results. In regard to new radiometric data, tufa deposits occurred predominantly during the Marine Isotopic Stages, at 313.3 ± 21 (MIS 9), 295.8 ± 63 (MIS 8-9), 230.8 ± 42 (MIS 7d-e), 228.8 ± 12 (MIS 7d), 215.7 ± 17 (MIS 7c) and 188.2 ± 16 (MIS 6-7a) ka, respectively. The climatic changes occurring between glacial and interglacial periods (such as during the Middle –Late Pleistocene) might probably influenced the precipitation of tufas in the area. In addition, the less negative and the more positive carbon isotopic values (between −0.8 and + 1.3‰ V-PDB) could be related to the progressive downstream CO2 degassing from host rocks, enhanced by high-velocity current conditions, changes in the soil-CO2 contribution and photosynthesis. The changes of δ18O values (between −8.3 and −10.1‰ V-PDB) are most probably related to variable effects of evaporation in depositional environment. Palynofloral data, gives important clues about the paleovegetation and paleoclimate of the region. This field survey has been conducted the first time in this area. Both carbon values and palynological findings show that drought conditions were dominantly present in the Pleistocene period, but in some processes drought conditions decreased depending on the amount of rainfall. The increasing amount of gymnosperm pollens is more likely to appear in more humid conditions due to the decreasing of drought condition in this time interval.
TURKISH JOURNAL OF EARTH SCIENCES, 2019
Introduction Extensional basins that develop after the closure of an ocean have a key role in und... more Introduction Extensional basins that develop after the closure of an ocean have a key role in understanding the spatial and temporal evolution from compressional to extensional tectonics. The basins in southwest Turkey are optimal places for studying postcollision events following the closure of the Neotethys Ocean. The development of sedimentary basins, such as the Kale-Tavas, Yatağan, and Ören basins, preserves the evidence of the transition from compression to extension of the regional tectonism (Seyitoğlu et al., 2004, Sözbilir, 2005). These basins in SW Turkey started to develop immediately after the emplacement of the Lycian Nappes over the Menderes Massif (Gürer and Yılmaz, 2002). The Menderes Massif and the Lycian Nappes are the main tectonic belts of southwest Turkey in the eastern Mediterranean. The Lycian Nappes were emplaced on the Menderes Massif during the Late Cretaceous-Eocene, related to the closure of the northern Neotethys Ocean
TURKISH JOURNAL OF EARTH SCIENCES, 2017
Özer et al., 2017), and these palynological studies were recorded from West and Central Anatolia.... more Özer et al., 2017), and these palynological studies were recorded from West and Central Anatolia. Contrary to this, the Paleogene micro-and macrofloras from East Anatolia and surrounding countries are still poorly documented, mainly due to their occasional occurrences and insufficient interest of the paleobotany community in their records (Sancay et al., 2006). In this study, palynofloral data from the Kağızman-Kötek and Kömürlü areas are given, together with a summary of paleovegetational and paleoclimatic differences between West, Central, and East Anatolia. Studies on the Paleogene macrofloras from several regions in Central and East Europe demonstrated that their bearing for understanding macrofloral diversity and for paleoenvironmental and paleoclimatic reconstruction is of considerable scientific interest (e.g., Kvaček and