Oxfordian (Jurassic) mayaitid (ammonite) dispersal in the Tibetan Himalaya as the first signal of the establishment of the Indo-Austrai subrealm  

作　　者：YIN Jiarun(China University of Geosciences, Beijing 100083, China) 

出　　处：《Progress in Natural Science:Materials International》2003年第4期282-287,共6页自然科学进展·国际材料（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 40072001) and the National Geographic Society of USA (Grant No.5865-97)

摘　　要：New fossil collections in the Lanongla area, Tibetan Himalaya enables the establishment of the Upper Jurassic ammonoidsuccession. Middle Oxfordian ammonite-fauna is characterized by endemic epimayaittds with a marine deepening event, suggesling a high stand of sea Ievel in the Tibetan Himalaya. Distribution of mayaitids around the Eastern Gondwana can be regarded as the first signal of the Indo-AustraI Subrealm that was progressively established during the Late Jurassic and Early Cretaceous times.New fossil collections in the Lanongla area, Tibetan Himalaya enables the establishment of the Upper Jurassic ammonoid succession. Middle Oxfordian ammonite-fauna is characterized by endemic epimayaitids with a marine deepening event, suggesting a high stand of sea level in the Tibetan Himalaya. Distribution of mayaitids around the Eastern Gondwana can be regarded as the first signal of the Indo-Austral Subrealm that was progressively established during the Late Jurassic and Early Cretaceous times.

关 键 词：JURASSIC OXFORDIAN AMMONITES Tibetan Himalaya Indo-Austral Subrealm. 

分 类 号：P534.52[天文地球—古生物学与地层学]