The western margin of the Çankırı Basin is delimited by a topographical high that separates the E... more The western margin of the Çankırı Basin is delimited by a topographical high that separates the Early to Middle Miocene Hançılı Basin in the west from the Çankırı Basin in the east (Fig. 1b). Seyitoğlu et al. (2000) claimed that the Neogene (Lower Miocene – Lower Pliocene) successions in both basins are correlated and were deposited within a once connected basin that became separated by an ophiolitic high during the Late Pliocene. This assumption is based on the correlation of red conglomerates and (Altıntaş or Kumartaş Formation) exposed in the Hançılı Basin and red to pinkish conglomerates, sandstones and mudstones exposed in the Çankırı Basin (Çandır Formation: Kaymakçı, 2000; Kaymakçı et al., 2001). However, this correlation seems impossible as the Çandır Formation (late Burdigalian to early Serrevalian; upper part of MN 5–6: 6 Krijgsman, 1996; Kaymakçı, 2000; Kaymakçı et al., 2001) is older than the Kumartaş Formation (Aquitanian; MN 2–3: Şen et al., 1998). The Kumartaş Formati...
Karasu-Kocaali coastal plain constitutes the eastern part of the Sakarya River delta. It was form... more Karasu-Kocaali coastal plain constitutes the eastern part of the Sakarya River delta. It was formed by the accumulation of terrestrial sediments along the coast. In this study, the coastal Quaternary units of the coastal plain are presented in detail. The 1:25 000 scaled geological maps were used as data base. Barrier islands, old and actual beach and marsh sediments which have been deposited by marine process and old and actual swamps, flood plains and river channel deposits developed by fluvial process are recognized. Barrier islands are the most conspicuous formations in the field. They are composed of sand size material transported by westerly winds and by wave motion forming parallel ridges along the shoreline The old and actual beach sediments are located at the seaward side of the barrier islands. It is interpreted that the shoreline has been moved towards the sea since the construction of older the barrier islands. The ridge and marsh assemblage behind the effective shorelin...
Catastrophic losses requires the development of specific national strategies and applications. Th... more Catastrophic losses requires the development of specific national strategies and applications. These may include liquefaction which is the main causes of great loss of life and property damage during the major earthquakes. A national research program on liquefaction susceptibility for earthquake hazard assessment is not available. To amend this shortcoming, National Earthquake Strategy and Action Plan-2023 under " The Regional Scale liquefaction Susceptibility Map of Turkey Project " was prepared by using geological and geomorphological criteria with the aim of producing liquefaction susceptibility maps. Depositional environments in which poorly compacted sediments, especially sand-and silt-sized grains deposited and in areas where the watertable was near surface, are the most susceptible to liquefaction. Therefore, areas susceptible to liquefaction can be determined by analysis and mapping of the geological, geomorphological and hydrogeological conditions of current sedim...
By utilizing the studies throughout the country, it is important to define the areas which are su... more By utilizing the studies throughout the country, it is important to define the areas which are susceptible to liquefaction in order to reduce the damage caused by earthquake. Based on these data, relative liquefaction susceptibility maps at the very low-very high range areas in the recent sediments can be prepared on a regional scale. Areas susceptible to liquefaction can be determined by analysis and mapping of the geological, geomorphological and hydrogeological conditions of recent sediments. In this respect, our first priority would be to focus on those studies that involve Quaternary sedimentary facies, historical liquefaction dataset and groundwater presence. It should be known that these studies are for preliminary consideration and the areas are defined by considering the soil which is susceptible to liquefaction. In the case of planning any engineering construction, other criteria related to liquefaction (earthquake, soil etc.) must be taken into consideration as well. The ...
The Güvem columnar basalts of Late Miocene are one of significant geosites of the Kızılcahamam – ... more The Güvem columnar basalts of Late Miocene are one of significant geosites of the Kızılcahamam – Çamlıdere Geopark in Ankara, Turkey. It forms a superposition of collonade and entablature basalts such an occurrence, superimposed regular and irregular basalt columns are very rare in the geological records. Therefore the geosite is a unique locality to study formation of columnar basalts wihch is one the oldest geological discussions, a part from being a scenic view for geopark visitors. Here we present individual geometries and mezoscopic features of the basalt columns, in addition to microscopy and grochemichal properties for genetic interpretations. In order to gther data, the basalt unit was mapped at the scale of 1 /5000 and then regular columns (colonnades at the lower part of the basalt) were counted and measured at three given areas ( 12-15 m wide and 18-20 m long). Irregular columns at the upper part of the unit were also counted and measured in 2m-intervals. It should be not...
Ankara ili üç adet Karagöl’e ev sahipliği yapmaktadır. Üç Karagöl de ismini etrafındaki çam orman... more Ankara ili üç adet Karagöl’e ev sahipliği yapmaktadır. Üç Karagöl de ismini etrafındaki çam ormanlarından alır. Bunlardan Beypazarı Karagöl, Ankara’nın KB kesiminde yer almakta olup kent merkezine yaklaşık 120 km mesafededir. Gölün tabanı hemen hemen düz olmakla birlikte en derin yeri 5,5 m civarındadır. Bir diğer Karagöl Ankara’nın kuzey doğusunda bulunan Çubuk ilçesinde bulunmakta olup Ankara kent merkezine 60 km mesafededir. Çubuk Karagöl, ortalama 6,5 m derinlikte ve düze yakın taban topografyasına sahiptir. Üçüncü Karagöl ise Ankara’nın kuzeyinde Kızılcahamam ilçesindedir. Ankara kent merkezine 100 km mesafede Işıkdağı eteklerinde yer alır. Kızılcahamam Karagöl aynı zamanda Kızılcahamam – Çamlıdere Jeoparkı jeositlerindendir. Diğer göllere nazaran daha sığdır. En derin yeri 4,5 m civarında olup yüzölçümü olarak da en küçük göldür. Göller çok sayıda ortak özellik gösterirler. Her üç göl de heyelan sonucu oluşmuştur. Volkanik birimler içerisinde yer alırlar ve çevre kayaçları and...
Nüfus baskısının getirdiği yeni yerleşim yerleri, çeşitlenen mühendislik yapıları, hammadde ihtiy... more Nüfus baskısının getirdiği yeni yerleşim yerleri, çeşitlenen mühendislik yapıları, hammadde ihtiyacı, kötü arazi kullanımı ve benzeri giderek artan insan faaliyetleri, jeolojik sitlerin (=jeosit) hızla ortadan kalkmasına yol açmakta olup, öyle ki, yakın gelecekte jeoloji eğitimi ve araştırmaları yapılamaz hale gelecektir. Sorun kayaçların tüketilmesi değil, yerkabuğu evriminin belgeleri olan jeositlerin tahribolmasıdır. Çünkü doğada rastlanan bütün kayaçlar ve ilgili oluşumların hepsi jeosit değildir; jeolojik olaylar ve süreçler hakkında yeterli bilgi veremezler. Miktarı fazla olmayan jeositlerin korunmaları lazımdır. Çözüm yollarından biri toplumda ”jeolojik koruma” fikrinin geliştirilmesi ve farkındalık yaratılmasıdır. Bunun için jeositlerin belirlenmesi ve belirlenenlerin kamuoyuna tanıtılması gerekir. Bu hedefe dönük olarak TÜBİTAK tarafından desteklenen bir proje gerçekleştirilmiş olup, buradaki sunumun konusunu oluşturmaktadır. Proje Ankara Valiliği’nin öncülüğünde kurulmakta...
The western margin of the Çankırı Basin is delimited by a topographical high that separates the E... more The western margin of the Çankırı Basin is delimited by a topographical high that separates the Early to Middle Miocene Hançılı Basin in the west from the Çankırı Basin in the east (Fig. 1b). Seyitoğlu et al. (2000) claimed that the Neogene (Lower Miocene – Lower Pliocene) successions in both basins are correlated and were deposited within a once connected basin that became separated by an ophiolitic high during the Late Pliocene. This assumption is based on the correlation of red conglomerates and (Altıntaş or Kumartaş Formation) exposed in the Hançılı Basin and red to pinkish conglomerates, sandstones and mudstones exposed in the Çankırı Basin (Çandır Formation: Kaymakçı, 2000; Kaymakçı et al., 2001). However, this correlation seems impossible as the Çandır Formation (late Burdigalian to early Serrevalian; upper part of MN 5–6: 6 Krijgsman, 1996; Kaymakçı, 2000; Kaymakçı et al., 2001) is older than the Kumartaş Formation (Aquitanian; MN 2–3: Şen et al., 1998). The Kumartaş Formati...
Karasu-Kocaali coastal plain constitutes the eastern part of the Sakarya River delta. It was form... more Karasu-Kocaali coastal plain constitutes the eastern part of the Sakarya River delta. It was formed by the accumulation of terrestrial sediments along the coast. In this study, the coastal Quaternary units of the coastal plain are presented in detail. The 1:25 000 scaled geological maps were used as data base. Barrier islands, old and actual beach and marsh sediments which have been deposited by marine process and old and actual swamps, flood plains and river channel deposits developed by fluvial process are recognized. Barrier islands are the most conspicuous formations in the field. They are composed of sand size material transported by westerly winds and by wave motion forming parallel ridges along the shoreline The old and actual beach sediments are located at the seaward side of the barrier islands. It is interpreted that the shoreline has been moved towards the sea since the construction of older the barrier islands. The ridge and marsh assemblage behind the effective shorelin...
Catastrophic losses requires the development of specific national strategies and applications. Th... more Catastrophic losses requires the development of specific national strategies and applications. These may include liquefaction which is the main causes of great loss of life and property damage during the major earthquakes. A national research program on liquefaction susceptibility for earthquake hazard assessment is not available. To amend this shortcoming, National Earthquake Strategy and Action Plan-2023 under " The Regional Scale liquefaction Susceptibility Map of Turkey Project " was prepared by using geological and geomorphological criteria with the aim of producing liquefaction susceptibility maps. Depositional environments in which poorly compacted sediments, especially sand-and silt-sized grains deposited and in areas where the watertable was near surface, are the most susceptible to liquefaction. Therefore, areas susceptible to liquefaction can be determined by analysis and mapping of the geological, geomorphological and hydrogeological conditions of current sedim...
By utilizing the studies throughout the country, it is important to define the areas which are su... more By utilizing the studies throughout the country, it is important to define the areas which are susceptible to liquefaction in order to reduce the damage caused by earthquake. Based on these data, relative liquefaction susceptibility maps at the very low-very high range areas in the recent sediments can be prepared on a regional scale. Areas susceptible to liquefaction can be determined by analysis and mapping of the geological, geomorphological and hydrogeological conditions of recent sediments. In this respect, our first priority would be to focus on those studies that involve Quaternary sedimentary facies, historical liquefaction dataset and groundwater presence. It should be known that these studies are for preliminary consideration and the areas are defined by considering the soil which is susceptible to liquefaction. In the case of planning any engineering construction, other criteria related to liquefaction (earthquake, soil etc.) must be taken into consideration as well. The ...
The Güvem columnar basalts of Late Miocene are one of significant geosites of the Kızılcahamam – ... more The Güvem columnar basalts of Late Miocene are one of significant geosites of the Kızılcahamam – Çamlıdere Geopark in Ankara, Turkey. It forms a superposition of collonade and entablature basalts such an occurrence, superimposed regular and irregular basalt columns are very rare in the geological records. Therefore the geosite is a unique locality to study formation of columnar basalts wihch is one the oldest geological discussions, a part from being a scenic view for geopark visitors. Here we present individual geometries and mezoscopic features of the basalt columns, in addition to microscopy and grochemichal properties for genetic interpretations. In order to gther data, the basalt unit was mapped at the scale of 1 /5000 and then regular columns (colonnades at the lower part of the basalt) were counted and measured at three given areas ( 12-15 m wide and 18-20 m long). Irregular columns at the upper part of the unit were also counted and measured in 2m-intervals. It should be not...
Ankara ili üç adet Karagöl’e ev sahipliği yapmaktadır. Üç Karagöl de ismini etrafındaki çam orman... more Ankara ili üç adet Karagöl’e ev sahipliği yapmaktadır. Üç Karagöl de ismini etrafındaki çam ormanlarından alır. Bunlardan Beypazarı Karagöl, Ankara’nın KB kesiminde yer almakta olup kent merkezine yaklaşık 120 km mesafededir. Gölün tabanı hemen hemen düz olmakla birlikte en derin yeri 5,5 m civarındadır. Bir diğer Karagöl Ankara’nın kuzey doğusunda bulunan Çubuk ilçesinde bulunmakta olup Ankara kent merkezine 60 km mesafededir. Çubuk Karagöl, ortalama 6,5 m derinlikte ve düze yakın taban topografyasına sahiptir. Üçüncü Karagöl ise Ankara’nın kuzeyinde Kızılcahamam ilçesindedir. Ankara kent merkezine 100 km mesafede Işıkdağı eteklerinde yer alır. Kızılcahamam Karagöl aynı zamanda Kızılcahamam – Çamlıdere Jeoparkı jeositlerindendir. Diğer göllere nazaran daha sığdır. En derin yeri 4,5 m civarında olup yüzölçümü olarak da en küçük göldür. Göller çok sayıda ortak özellik gösterirler. Her üç göl de heyelan sonucu oluşmuştur. Volkanik birimler içerisinde yer alırlar ve çevre kayaçları and...
Nüfus baskısının getirdiği yeni yerleşim yerleri, çeşitlenen mühendislik yapıları, hammadde ihtiy... more Nüfus baskısının getirdiği yeni yerleşim yerleri, çeşitlenen mühendislik yapıları, hammadde ihtiyacı, kötü arazi kullanımı ve benzeri giderek artan insan faaliyetleri, jeolojik sitlerin (=jeosit) hızla ortadan kalkmasına yol açmakta olup, öyle ki, yakın gelecekte jeoloji eğitimi ve araştırmaları yapılamaz hale gelecektir. Sorun kayaçların tüketilmesi değil, yerkabuğu evriminin belgeleri olan jeositlerin tahribolmasıdır. Çünkü doğada rastlanan bütün kayaçlar ve ilgili oluşumların hepsi jeosit değildir; jeolojik olaylar ve süreçler hakkında yeterli bilgi veremezler. Miktarı fazla olmayan jeositlerin korunmaları lazımdır. Çözüm yollarından biri toplumda ”jeolojik koruma” fikrinin geliştirilmesi ve farkındalık yaratılmasıdır. Bunun için jeositlerin belirlenmesi ve belirlenenlerin kamuoyuna tanıtılması gerekir. Bu hedefe dönük olarak TÜBİTAK tarafından desteklenen bir proje gerçekleştirilmiş olup, buradaki sunumun konusunu oluşturmaktadır. Proje Ankara Valiliği’nin öncülüğünde kurulmakta...
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