Fossil sea lilies of the genus Isselicrinus Rovereto, 1914 from the lower Oligocene, Eastern Rhodopes (Bulgaria)

Pages: 
pp. 37-41
Regional Museum of History Kardzhali, 4 Republikanska Str., 6600 Kardzhali, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
Abstract: 

Fossil sea lilies of the genus Isselicrinus Rovereto, 1914 were found near the village of Raven, Momchilgrad Municipality, in the Eastern Rhodopes in 1978. They were recovered from the rocks of the Raven complex. The latter is composed of rhyolite pyroclastics with layers of reef limestones. With the Ar/Ar method, the pyroclastics of thе Raven complex have been dated as 31.19–30.97 Ma (early Oligocene). The presence of reef limestones suggests shallow coastal waters with normal salinity and a warm climate, in which Isselicrinus lived. These were the outskirts of a tropical basin, inhabited by faunas, which today have their descendants in the tropical areas.

Keywords: 

Isselicrinus sp., family Isselicrinidae, taxonomy, lower Oligocene, Eastern Rhodopes, Bulgaria

VOLUME 47 (1)/May 2018

Faculty of Geology and Geography, Department of Mineralogy, Petrology and Economic Geology, Sofia University “St Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia

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University of Mining and Geology “St Ivan Rilski”, Department of Geology and Geoinformatics, 1 Prof. Boyan Kamenov Str., Studentski Grad, 1700 Sofia, Bulgaria
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Sofia University “St Kliment Ohridski”, Department of Geology, Palaeontology and Fossil Fuels, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria

Regional Museum of History Kardzhali, 4 Republikanska Str., 6600 Kardzhali, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Department of Sedimentary Basins and Petroleum, Shahid Beheshti University, 1983969411 Tehran, Iran

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