Distribution of Triassic Foraminifers in the Limestone Massifs of the Dalnegorsk District, Primorsky Krai

Abstract

Foraminifer assemblages from five massifs of the Triassic limestones of the Dalnegorsk District have been described for the first time, and images of these foraminifers are provided. Foraminifer associations are found here on all the known stratigraphic levels, except for the Rhaetian. In the massif of Mount Verkhnii Rudnik, four foraminifer assemblages have been recorded within the interval from the Carnian to the top of the Norian. The foraminifer assemblages in the Dalnegorsk limestones are comparable to the coeval foraminifer associations of the Carpathians and the Alps. The research results make it possible, for the first time, to compare the foraminifer assemblage composition between various limestone massifs and different stratigraphic levels.