Original paper

Early-Middle Triassic echinoderm remains from the Istranca Massif, Turkey

Hagdorn, Hans; Göncüoglu, M. Cemal

Abstract

In the northwestern part of the Istranca Massif close to the Turkish-Bulgarian border, recrystallized limestones above germanotype fluvial clastics (Buntsandstein-equivalents) yielded remains of echinoderms and bivalves. The limestones are lensoidal, flaser-bedded and bioturbated, like the Holocrinus lagerstätten, which are common in the germanotype Muschelkalk. The sufficiently preserved crinoid ossicles can be assigned to genus Holocrinus, a crinoid clade that occurs worldwide in Early and Middle Triassic sediments. This is so far the first Triassic fossil data from the Istranca Massif and provides evidence for the correlation with similar Triassic successions in the Balkans to the West and the Istanbul Terrane to the East.

Keywords

early to middle triassicturkeyistranca-massifcrinoidspalaeoecology