Additional physical format online version polenova en elena nikolaevna 1915 ostracoda of the devonian deposits in the central devonian field and the middle volga region. Devonian ostracods from western canada palaeozoogeographic implications authors en 1953 ostracoda from the devonian deposits of the central devonian field and the middle volga area trudy vnigri en 1970 late silurian and early devonian ostracoda of the altai sayan region trudy inst geol geofiz akad nauk . Pennsylvanian ostracoda from menard county texas texas univ bull 2901 139 161 knight jb 1928 some pennsylvanian ostracodes from the henrietta formation of eastern missouri j paleonr 2 3 4 229 267 318 336 wlenova en 1953 ostracoda of the devonian deposits in the central devonian field and the middle volga region russian. Devonian period devonian geology the union of the paleocontinents of laurentia and baltica occurred near the beginning of the devonian to form a single landmass that has been referred to both as laurussia and as euramerica the northern portion of the combined landmass gave rise to widespread areas of continental desert playa and alluvial plain deposits that form one of the earliest . The silurian and early devonian deposits of the severnaya zemlya archipelago are correlated with the beds of adjacent regions of northern eurasia a number of reference levels for comparison of the severnaya zemlya stratigraphic scheme with the general stratigraphic scale are revealed
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