New data on the Middle and Upper Jurassic stratigraphy in the Konyava Mountain, SW Bulgaria

Pages: 
pp. 59-67
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
"Sofgeoprouchvane" Ltd.
Abstract: 

А transition from the classical Jurassic Balkanide development towards the predominantly terrigenous sedimentation pattern of the Treklyano zone is observed in the Коnуаvа Mountain. Most of the sections begin with the sandstones of the Gradets Formation (Toarcian – Aalenian Stage) followed bу the Polaten Formation (shallow marine limestones; Aalenian - middle parts of the Bathonian Stage), Momchil Formation (shales and marls with limestone interbeds; uррег parts of the Bathonian Stage – Oxfordian Stage), and the flysch Kostel Formation (Upper Jurassic). Some parts of the Kostel Formation are characterized here by а shallow-water marine sedimentation. In the north-eastern parts of the Коnуаvа Mountain, а lateral transition towards the Svetlya Jurassic graben has been observed, and the Momchil and parts of the Kostel Formation are laterally replaced by the carbonate breccia and conglomerate of the Lobosh Formation (Callovian - parts of the Кimmeridgian Stage).

Загорчев, Ив., Трифонова, Е., Иванова, Д., Стойкова, Кр., Горанов, Е., Пемов, Л. Новые данные о средне- и верхнеюрской стратиграфии горы Конявы, ЮЗ Болгария. В пределах горы Конявы осуществляется переход от классического юрского разреза Балканид к преимущественно теригенному разрезу Треклянской зоны. Большинство разрезов начинаются песчаниками Градецкой свиты (туарский – ааленский ярусь), следуют Полатенская свита (мелководные морские известняки; ааленский - средние части батского яруса), Момчилская свита (аргиллиты и мергели переслаивающиеся песчаниками; верхние части батского яруса – оксфордский ярус) и флишевая Костелская свита (верхняя юра). Некоторые части Костелской свиты характеризуются довольно мельководным характером седиментов. В северо-восточных частях Конявской горы осуществляется также латеральная стиковка к Светлянскому юрскому грабену, а Момчилская и части Костелской свиты замещаются карбонатными брекчиями и конгломератами Лобошской свиты (каловский – части кимериджского яруса).

Keywords: 

Middle and Upper Jurassic, lateral variations, SW Bulgaria

VOLUME 30 (1-2)/June 2000

Institute of Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Bem ter 18/c, H-4001, Debrecen, Hungary
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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, 1113 Sofia, Bulgaria
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Institute of Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary
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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, 1113 Sofia, Bulgaria

Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia
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Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia
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Department of Geology and Palaeontology of the I. Javakhishvili Tbilisi State University, Chavchavadze Av. I, 380028, Tbilisi, Georgia

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
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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"Sofgeoprouchvane" Ltd.

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

Natinal Museum of Natural History, Bulgarian Academy of Sciences, 1, Tsar Osvoboditel blvd., 1000 Sofia, Bulgaria
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University of Thessaloniki, Laboratory of Geology and Palaentology, 54006 Thessaloniki, Greece

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