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Paleobasins of Earth in the late Triassic and stratigraphy of the terminal Triassic of the Boreal Subrealm

https://doi.org/10.31242/2618-9712-2019-24-1-5-17

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Abstract

On the basis of material collected from deepwater drilling of the World Ocean floors (programs DSDP, 1963–1984 and the ODP, 1985–2003) and generalizations of new data of stratigraphy, paleogeography, and paleobiogeography on the propagation of marine fauna, it is shown, in the Late Triassic lithosphere was not broken into tectonic plates, and the ocean basins of Paleotethys and Paleo-Pacific (=Panthalassa) were absent. We present a new model for the paleogeography of the Earth in the Late Triassic, which provides for the existence of three supercontinents – Afalia, Pacifida, Arasia and two continents – Antarctida and Hyperborea, which divided the inland shelf sea basins and their geodynamics is examined. Based on the study of the differentiation and geographical distribution of the families and subfamilies of the late Triassic (Rhaetian) brachiopods: the Boreal, Tethyan and Notal biogeographical realms, are distinguished. In the Tethyan Realm there are the AlpineChinese, Melanesian, West-North American and West-South American subrealms. The interlinking of the initial stage of the Upper Triassic (Rhaetian) – Upper Jurassic (Volgian) megacyclite and phase in the development of marine fauna makes it possible to distinguish the Byrandian Stage in the Boreal Standard of the Upper Triassic. It is shown, the terrigenous and terrigenous-sedimentary (Northern Priokhotie) types of sedimentation prevailed in the Boreal epicontinental marine basin.

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Grinenko V.S., Baranov V.V., Blodgett R.B., Goryacheva A.A. Paleobasins of Earth in the late Triassic and stratigraphy of the terminal Triassic of the Boreal Subrealm. Arctic and Subarctic Natural Resources. 2019;24(1):5-17. (In Russ.) https://doi.org/10.31242/2618-9712-2019-24-1-5-17

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ISSN 2618-9712 (Print)
ISSN 2686-9683 (Online)