The Silurian of the Çatak and Karadere areas of the Zonguldak Terrane, NW Anatolia

Pages: 
pp. 103-110
Bulgarian Academy of Sciences, Geological Institute, Acad. G. Bonchev St. Bl. 24, 1113 Sofia, Bulgaria
Middle East Technical University, Department of Geological Engineering, 06531 Ankara, Turkey
General Directorate of Mineral Research and Exploration, Department of Geological Research, 06520 Ankara, Turkey
General Directorate of Mineral Research and Exploration, Department of Geological Research, 06520 Ankara, Turkey
Abstract: 

Silurian rocks in the newly discovered Catak and Ovacık sections of the Zonguldak Terrane to the SE of Eflâni and Safranbolu-Karadere areas, respectively, were studied by means of graptolites. They are included in Fındıklı Formation, dominated by black siliceous argillites and lydites in the lower part, black argillites and sandy limestones in the middle part and shales with sandy limestone and limey siltstone in the upper part. From bottom to the top four intervals with graptolites belonging to Upper M. riccartonensisM. belophorus, Upper Cyrt. rigidusCyrt. perneri and Cyrt. lundgreni Biozones, respectively, were recognized in the Catak section. In the Ovacık section, the identified graptolites belong to the L. convolutus, Upper Str. crispus-Sp. turriculatus, O. spiralis and Upper M. riccartonensisM. belophorus Biozones.
   The available data indicate that the studies succession includes an interval from mid Aeronian to early Homerian. Another important implication of the new findings is that the Silurian in the Catak area is typical for the Zonguldak Terrane. Moreover, it is obvious that the Upper Silurian succession was completely eroded in this terrane during the Mid Devonian event.

В. Сачански, М. Чемал Гьончоолу, И. Гедик, Ч. Okуючу. Силур районов Чатак и Карадере (террейн Зонгулдак) — Северо-Западная Анатолия. Проведено исследование силура в новоустановленных разрезах Чатак и Овачык (террейн Зонгулдак), обнаженнх к юго-западу от районов Эфлани и Шафранболу-Карадере. Разрезы принадлежат к свите Фындыклы, которая представлена преимущественно черными силициевыми аргиллитами и лидитами (в нижних отделах), черными аргиллитами и песчанистыми известняками (в средних отделах) и глинами с печанистыми известняками и известковыми алевролитами (в верхних отделах). Снизу вверх по разрезу Чатак установлено четыре интервала с граптолитами. Они принадлежат к следующким биозонам: верхняя М. riccartonensisM. belophorus; верхняя Cyrt. rigidusCyrt. perneri и Cyrt. lundgreni. В разрезе Овачык граптолиты принадлежат к биозонам: L. convolutus, к верхней Str. crispusSp. turriculatus, O. spiralis и к верхней М. riccartonensis M. belophorus
   Наличные данные показывают, что, во первых, исследованные последовательности пород находятся в интервале средний Аэрониан — ранний Гомериан. Из новых находок проистекает и второй важный вывод, а именно, что силур района Чатак является типичным для террейна Зонгулдак. Более того, ясен и третий вывод о том, что породы верхнесилурийской последовательности были полностью уничтожены эрозией во время среднедевонских событий.

Keywords: 

Silurian, graptolite, stratigraphy, NW Turkey

VOLUME 36 (3-4)/December 2007

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria, G. Bonchev Str., Block 24

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 24, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 24, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, Bulgaria, 1113 Sofia, Acad. G. Bonchev Str., Bl. 24

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Acad. G. Bonchev St., Bl. 24
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Acad. G. Bonchev St., Bl. 24

Geological Institute of the Bulgarian Academy of Sciences, 1113 Sofia, Acad. G. Bonchev St., 24

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Instituto Andaluz de Ciencias de la Tierra, CSIC, Granada, Spain
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University of Granada, Granada, Spain
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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University of Granada, Granada, Spain
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, 24 Acad G. Bonchev Str., 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian academy of Scienses, 1113 Sofia, 24 G. Bonchev Str.
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Geological Institute, Bulgarian academy of Scienses, 1113 Sofia, 24 G. Bonchev Str.

Sofia University “St. Kliment Ohridsky”, 1000 Sofia, 15 Tsar Osvoboditel Blvd.
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Geological Institute Bulgarian Academy of Sciences, 1113 Sofia, 24 G. Bonchev Str.
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Geological Institute Bulgarian Academy of Sciences, 1113 Sofia, 24 G. Bonchev Str.
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Ministry of Environment and Water, 1000 Sofia, 22 Maria Louisa Blvd.

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Bulgarian Academy of Sciences, Geological Institute, Acad. G. Bonchev St. Bl. 24, 1113 Sofia, Bulgaria
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Middle East Technical University, Department of Geological Engineering, 06531 Ankara, Turkey
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General Directorate of Mineral Research and Exploration, Department of Geological Research, 06520 Ankara, Turkey
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General Directorate of Mineral Research and Exploration, Department of Geological Research, 06520 Ankara, Turkey

Geophysical Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences
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Geological Institute, Bulgarian Academy of Sciences
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Geological Institute, Bulgarian Academy of Sciences