Correlation of the Keuper Series of the Triassic by Miospores

Abstract

DURING an investigation of microfossil assemblages from the Keuper series (Upper Triassic) of the English Midlands a number of points concerning Triassic palaeogeography and correlation between Britain and the Continent have arisen. In the Keuper Sandstone formation six samples from the Sugarbrook No. 2 borehole, Bromsgrove, Worcestershire (SO.962682), yielded abundant miospores. These assemblages consist mainly of non-striate bisaccate forms of which the dominant genus is Alisporites. Associated with these forms are rarer striate bisaccate, monosaccate, monocolpate and trilete miospores. The assemblages are rather uniform in composition throughout the Keuper Sandstone and show a resemblance to assemblages described from the Muschelkalk of Germany¹.