CHARACTERISTICS AND PALEOENVIRONMENT OF THE BIVALVE PERGAMIDIA-HALOBIA COMMUNITY FROM MIANGE FORMATION OF UPPER TRIASSIC IN CHANGTAI OF WESTERN SICHUAN
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Abstract:
The Miange Formation of the Upper Triassic is mainly composed of rhyolite in Changtai of Western Sichuan.The rhyolite is covered with slate that has abundant bivalve fossils.The fossils are completely preserved,and their distribution was steady.The fossils from the Miange Formation have a higher concentration and a lower diversity.A fossil community may be established based on its dominant genus and common genus organisms.Take the Genlong profile as an example,the development of Pergermidia-Halobia communit...
