Palynology of the uppermost Lower to Middle Jurassic strata on Bomholm, Denmark

Abstract

The lithology and palynology of a section, 103 metres thick, from Bagagraven clay pit on Bornholm, Den­mark is recorded, and an environmental interpretation is proposed 70 spore-pollen morphotypes are recognized and systematically treated. The relative abundances are determined for 15 samples, representative for the total of 51 prepared samples. Three biozones are established, and based on the occurrence of selected morphotypes from ammonoid­zoned strata in England, Holland and DDR, the lowest zone is dated to latest Toarcian and the lower part of the middle zone to early Aalenian. The remainder of the Baga section is referred to Middle Jurassic by correlation to Swedish palynofloras.