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Cretaceous microfossils as indicators of cooling episodes (Boreal and Peri-Tethyan Russia)

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posted on 13.11.2019 by V. S. Vishnevskaya, L. F. Kopaevich
S4. Palaeogeographic sketch for Early Campanian. Distribution of the foraminifera and radiolaria in the EEP and in the Crimea–Caucasus area. White colour—land, area of denudation or erosian; blue colour—marine sediments. 1—Oxytoma teniucostata (Roemer), boreal bivalve migrant from Western Siberia; 2—Marsupites testudinarius Schlotheim, crinoids from Tethys area. Calcareous benthic foraminifera of the Pseudogavelinella clementiana Zone: 3—P. clementiana (d'Orbigny); 4—Bolivinoides decoratus Jones. Planktonic foraminifera of Globotruncana arca beds on Mangyshlak MTS: 5—Globotruncana arca (Cushman); planktonic foraminifera of Globotruncanita elevata Zone in Crimea–Caucasus area: 6—Globotruncanita elevata (Brotzen). Radiolaria: 7—boreal radiolaria Prunobrachidae.

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