Abstract
Lower Cambrian deposits are found throughout the Soviet Union and Mongolia (Fig. 1). They occur over the entire Siberian Platform, much of the East European Platform, and widely in the fold belts bordering the southern Siberian Platform (the Altay-Sayan Fold Belt, Mongolia—Okhotsk Fold Belt), Kazakhstan, Central Asia, and the Urals. In most cases, they are conformably underlain by Vendian rocks. The most important sections containing Early Cambrian fossils are in Siberia,
Tectonic scheme of the USSR and nearby territories [modified from Yanshin et al. (1984)]. (1, 2) Ancient cratons including framing mobile belts: (1) Laurasian affinity; (2) “Pacific” affinity. (3) The main regions of Cambrian sedimentation: (a) Baltic Syneclise of the East European Platform, (b) Lena-Aldan area of the Siberian Platform, (c) Altay-Sayan Fold Belt, (d) western Mongolia, (e) Maly Karatau (south Kazakhstan), (f) South Urals, (g) central Kazakhstan, (h) Transbaikalian, (i) Far East, (j) Kolyma Basin.
the East European Platform and Kazakhstan in the USSR, and in western Mongolia. The key region for the Cambrian stages adopted in the USSR is the Siberian Platform.
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Rozanov, A.Y., Zhuravlev, A.Y. (1992). The Lower Cambrian Fossil Record of the Soviet Union. In: Lipps, J.H., Signor, P.W. (eds) Origin and Early Evolution of the Metazoa. Topics in Geobiology, vol 10. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2427-8_7
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