biostratigraphy, carbonate rocks, Cenozoic, detrital sedimentation, Eocene, Europe, Foraminifera, Invertebrata, Italy, lower Oligocene, marine environment, microfossils, Oligocene, paleoenvironment, Paleogene, pelagic environment, Protista, sedimentary rocks, sedimentation, Southern Europe, stratigraphy, Tertiary, Umbria Italy
GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique, Vandoeuvre-les-Nancy, France
