Larger foraminiferal and coralline algal facies in an Upper Eocene storm-influenced, shallow-water carbonate platfonn (Colli Berici, north-eastern Italy)

摘要

Facies analysis of Priabonian shallow-water carbonate successions in the outcrops near Mossano (eastern Colli Berici, northeastern Italy) and the subsequent integration of palaeoecological data have been used to produce a detailed palaeoenvironmental model. The facies distribution and the processes, which controlled the larger benthic foraminiferal and coralline algal assemblages in the study Priabonian storm-influenced, carbonate ramp, are discussed in detail. In the middle-ramp trough, cross-bedded small Nummulites and rhodolith packstones pass laterally into coralline algal crust wackestones. These rhodoliths exhibit two well-differentiated growth-phases: the first occurring during low-water energy perio The occurrence of the channel structures in orthophragminid rudstones and in the coralline crustose pavement appears to be unique in Upper Eocene carbonate ramp depositional systems. During the erosive events associated with the return currents, thes