УМОВИ СЕДИМЕНТАЦІЇ МІОЦЕНОВИХ ВІДКЛАДІВ БЕРЕЖНИЦЬКОЇ СВІТИ (САМБІРСЬКИЙ ПОКРИВ, ПЕРЕДКАРПАТСЬКИЙ ПРОГИН) НА ОСНОВІ ВИВЧЕННЯ ДРІБНИХ ФОРАМІНІФЕР

Abstract

Ratio analisis of planktonic and benthic foraminifers and their tacsonomy composition of morfological features demonstrates that in the Middle and at the beginning of Late Miocene sedimentation Sambir sub-basin, in which accumulated deposits of Berezhnytsa formation, generally corresponded depths of inner shelf. This sub-basin characterized by normal-salt or close to these conditions. Some characteristics indicate satisfactory aeration of cold-temperate bottom water. Decreasing of number planctonic foraminifer in the uppermost part of the formation could indicate about shallowing of the basin or strong terrigene pollution of surface water.