Jurassic ammonites of the Wulong area, Tingri County, Tibet

• Autorzy: Morton N. , Meister Ch. , Ruellau L. , Shi X.

Identyfikatory

DOI

10.5604/17313708.1185691

• Języki publikacji: EN

Abstrakty

EN

The Jurassic succession west of Wulong village, Tingri County, southern Tibet, is described. Lithostratigraphical classification uses pre-existing terminology for formations, and an informal subdivision into members is proposed. An important structural dislocation, in the form of a small-scale flower structure, affects the Zhamure Formation straddling the Triassic/Jurassic boundary but does not affect the underlying Derirong Formation (Rhaetian) or the overlying Wulong Formation (Lower Jurassic). No other major structural discontinuities could be recognised. New finds of ammonites in situ include a new genus and species of possible schlotheimiid, Womalongiceras inflatum, with a probable age of Sinemurian or slightly younger. Two separate beds yielded rich assemblages of crushed ammonites identified as Nyalamoceras nyalamensis Chao and Wang (1956) here interpreted as a hammatoceratid. The age of these is reinterpreted as uppermost Aalenian on the basis of an accompanying specimen of ?Pseudolioceras (Tugurites) sp. nov. and poorly preserved ammonites from higher beds identified as graphoceratids (?Graphoceras).

Słowa kluczowe

EN

ammonites; Jurassic; Tibet; systematics; biostratigraphy

PL

amonity; jura; Tybet; systematyka; biostratygrafia

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2015
• Tom: Vol. 13, no. 2
• Strony: 1--21
• Opis fizyczny: Bibliogr. 43 poz., rys., tab., wykr.

Twórcy

autor

Morton N.

• Formerly Birkbeck College, University of London, Le Chardon, 180 Chemin Brugière, 07200 Vogüé, France

autor

Meister Ch.

• Natural History Museum of Geneva, Department of Geology and Paleontology, 1 Rte de Malagnou, CP 6434, 1211 Geneva 6, Switzerland

autor

Ruellau L.

• Ch. de l’Herbetan, 69380 Chasselay, France

autor

Shi X.

• Department of Geology, China University of Geosciences, 29 Xueyuan rd, Beijing 100083, China

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