Palynological study of the Gurkovo Formation Westphalian D/Cantabrian), Dobrudzha Basin, Bulgaria

Pages: 
pp. 29-43
Geological lnstitute, Bulgarian Academy of Sciences, Sofia 1113
Abstract: 

The present paper contains the morphological remarks and stratigraphical analysis of microspores from the Gurkovo Formation, Dobrudzha Coal Basin, NE Bulgaria. The palynological data obtained from samples from the boreholes 172 and 191 near Gurkovo are systematically discussed for the first time in the present study. The litho- and biostratigraphical data for this region have been previously described in a number of publications. The absence of precise data from the most upper level of Gurkovo Formation is subject of further discussions about the boundary between Westphalian D and Cantabrian stages in regional aspect. The levels of the two boreholes studied for the purpose of this article, contain spores systematically described including the following species: Spinosporites spinosus, Thymospora pseudothiessenii, Angulisporites splendidus, Cadiospora magna and Candidispora candida; genus Latensina. The aim of this paper is to further examine the youngest sediments from the Gurkovo Formation on the basis of existing data systematically determined together with additional information, as yet unpublished.

Т. Дuмитрова. Палинологическое исследование Гурковской свиты (Добруджанкий бассейн), Болгария. Приведено описание морфологических особенностей микроспор из Гурковской свиты (Добруджанский бассейн, Северо-Восточная Болгария) и сделан их стратиграфический анализ. Впервые систематически обсуждются палинологические данные, полученные при обработке отдельных частей разрезов свиты по материриалу из буровых скважин 172 и 191 (район с. Гурково). Лито- и биостратиграфические данные по району уже описаны в предыдущих работах. Дополнительно обсуждаются региональные аспекты границы между вестфалем D и кантабрийским ярусом с учетом отсутствия точных данных о самых верхних отделах Гурковской свиты. Систематически определенные споры относятся к видам Spinosporites spinosus, Thymospora pseudothiessenii, Angulisporites splendidus, Cadiospora magna, Candidispora candida и к роду Lafensina. Цель работы – дать дополнительную характеристику самых молодых пород Гурковской свиты на основании наличных данных и еще неопубликованной информации.

Keywords: 

Microspores, palynology, Westphalian/Cantabrian, Gurkovo Formation, Dobrudzha Coal Basin, systematics, taxonomic aspects

DOI: 
10.52321/GeolBalc.34.3-4.29

VOLUME 34 (3-4)/December 2004

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. bl. 24, 1113 Sofia, Bulgaria
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ATOMKI, Hungarian Academy of Sciences, Bem ter 18/c, H-4001, Debrecen, Hungary
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. bl. 24, 1113 Sofia, Bulgaria

Serbian Academy of Sciences and Arts, Knez Mihailova 35, 1100 Beograd, Serbia
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Technical Faculty, 27000 Kosovska Mitrovica, Serbia
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Vedrnadsky Institute o(Geochemistry and Analytical Chemistry (GEOKHI), Russian Academy of Sciences, ut. Kosygina 19, Moscow, 117975 Russia
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Faculty of Mining and Geology, Djušina 7, 1000 Beograd, Serbia
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Serbian Academy of Sciences and Arts, Knez Mihailova 35, 1100 Beograd, Serbia

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

University of Mining and Geology "St. Ivan Rilski", 1700 Sofia. Bulgaria
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Montanuniversität, A -8700 Leoben, Austria

National Museum of Natural History, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
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UPR 2147 CNRS, 44 rue de I'Amiral Mouchez, 75014 Paris, France
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Paleontological Branch of the National Museum of Natural History - Sofia, Assenovgrad, Bulgaria

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