Cretaceous Environments of Asia by Hakuyu Okada and Nlall J. Mateer (Eds.)

By Hakuyu Okada and Nlall J. Mateer (Eds.)

This e-book provides a synthesis of the important environmental features of the Cretaceous in East and South Asia. The examine used to be entire lower than IGCP undertaking 350, which offers with the organic, climatological and actual environments of this area through the Cretaceous. This synthesis discusses points of stratigraphy, sedimentology, paleontology, geochemistry, tectonics, petrology, mineralogy, and geophysics. The study effects are summarised by way of nation, and comprise some distance East Russia, Mongolia, jap China, Korea, Japan, Philippines, Vietnam, Laos, Cambodia, Thailand, and India. even though those international locations don't surround the whole sector, this assurance offers a great point of view of the evolution of the sector throughout the Cretaceous. The files included during this e-book current a wealth of marine and nonmarine facts on weather, biotic range, move and chemistry of the sea in addition to primary plume tectonism. The latter seems to have triggered a lot of the environmental switch during this vast zone, together with either an more advantageous greenhouse impression and excessive sea degrees.

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Mihoensis, beds with bivalves Cuspidaria brevirostris (Coniacian), two foraminifer zones: Silicosigmolina futabaensis, Rzehakia subcircularis and Planulina rumoiensis, Globotruncana japonica, Trochammina oriovica and radiolarian complexes - Spongodiscus impressus and Spongurus sp. [24]. Yazykova [68] analyzed in detail ammonite and inoceramid zones, as well as stages of the organism evolution and suggested her own version to determine a boundary between the Turonian and Coniacian. The appearance of the endemic Inoceramus uwajimensis and cosmopolitan /.

Platanus cuneifolia, and Tetracentron aff. potomacence [98]. In Sakhalin during the mid-Albian there existed a marine basin, in which islands were intermittenly emergent. The role of diverse liana-form ferns (Schizaeacea and Polypodiaceae) and Ginkgoaceae, Hirmerellaceae and Gnetales among gymnosperms in the late Albian flora shows a marine cooling influence. In the early Cenomanian the amount of Bryales, Lycopodium-form, Selaginellaceae became more diversified, and the abundance of Taxodiaceae and angiosperms increased.

Three of them are related to the Okhotsk-Chukchi province, whereas the other three younger horizons (beginning from late Santonian) belong to the Japan province. , Aralicephyllum samargense, Araliopsoides cretacea, and Cinnamomorphyllum sp. The palynomorph assemblages are dominated by Gymnospermaceae: Taxodiumpollenites hiatus, Inaperturopollenites dubius, bisaccate close to Pinaceae and Podocarpus. Among the spores the most characteristic are: Foveosporites cenomanicus, F. , T. variabilis, Retitriletes georgansis, R.

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