During the ARCTIC '91 expedition aboard RV Polarstern (ARK VIII/3) to the Central Arctic Ocean, a box corer sample on the Gakkel Ridge at 87°N and 60°E yielded a layer of sand-sized, dark brown volcanic glass shards at the ...

The studies of past climatic changes form the basis for predicting our future anthropogenic world and are among the most prominent topics in current Earth sciences. Although the Cretaceous is generally considered as a ...

The Pyoza River area in the Arkhangelsk district exposes sedimentary sequences suitable for study of the interaction between consecutive Valdaian ice sheets in Northern Russia. Lithostratigraphic investigations combined ...

The Neoproterozoic–Cambrian succession in the Zavkhan Basin of western Mongolia preserves early Cambrian bioconstructions of Nemakit-Daldynian to Botomian age. As elsewhere (Siberia, Morocco), the Nemakit-Daldynian ...

Despite the fact that crinoids were an important component of the benthic communities in the Early Carboniferous seas of central European Russia, their remains have been only poorly studied so far. The present work partly ...

This article discusses the isotopic dates for the Albian alkaline basic rocks (116-104 Ma) in the Pribrezhnaya structural zone of the Primor'e region and investigated their mineral compositions. The graphite-ilmenite ...

This study is the first of a series of works on trigoniids (Class Bivalvia) from the Lower Cretaceous of the Crimea. It contains systematic descriptions of nine genera and 15 species and subspecies of trigoniids from the ...

Early Cretaceous volcanic rocks of the Mariisky sequence and Early Cenozoic extrusive-vent rocks of the Mary Cape are exposed at the most northwest of the Schmidt Peninsula, North Sakhalin. In chemical composition, all the ...

Labradorite reacted with HCl solution (pH = 2.0) develops leached layers extending to about 500 #9 depth after 12 h leaching, and to 1500 #9 depth after 143 h leaching. Accurate Al, Ca, and Na compositional depth profiles ...