Paleocene bryozoa from a boring in Surinam

Abstract

Two species of Bryozoa, identified as belonging to the genera Nellia and "Vincularia", occur in some quantity in the Paleocene interval in the boring Alliance-28, drilled in the coastal plain of Surinam (Dutch Guiana). Both the Nellia and the "Vincularia" occur in assemblages virtually consisting of one single species. Recent assemblages in which Nettia makes up 80-100% of the total count indicate shallow inner-neritic (2-10 fathoms) conditions, coupled with slightly reduced salinities (<33‰). A similar environment is inferred for the Paleocene Nellia assemblage in the boring.