Coal and carbonaceous shale samples were taken from the Late Oligocene Bobov Dol Basin, SW Bulgaria. Seams I, I, II, III, IV and V from the coal-bearing Bobov Dol Fm. were sampled to provide insights into the peat forming vegetation and depositional environment based on detailed organic petrological and geochemical study.

中文翻译：

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从岩石学和地球化学特征推断博博夫多尔盆地（保加利亚西南部）渐新世晚期次烟煤沉积期间的古植被和环境

煤和碳质页岩样品取自保加利亚西南部渐新世晚期博博夫多尔盆地。来自含煤 Bobov Dol Fm 的煤层 I、I、II、III、IV 和 V。根据详细的有机岩石学和地球化学研究，进行了采样，以深入了解泥炭形成的植被和沉积环境。