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- Title
Latest Jurassic–earliest Cretaceous radiolarian fauna from the Xialu chert in the Yarlung Zangbo suture zone, southern Tibet: Comparison with coeval western Pacific radiolarian faunas and paleoceanographic implications.
- Authors
Matsuoka, Atsushi; Qun Yang; Takei, Masahiko
- Abstract
The Xialu chert radiolarian fauna is latest Jurassic–earliest Cretaceous in age ( Pseudodictyomitra carpatica zone) and contains many taxa in common with coeval northern hemisphere middle-latitude (temperate) radiolarian faunas represented by the Torinosu fauna in southwest Japan. Common elements include Eucyrtidiellum pyramis (Aita), Protunuma japonicus Matsuoka & Yao, Sethocapsa pseudouterculus Aita, Sethocapsa (?) subcrassitestata Aita, Archaeodictyomitra minoensis (Mizutani), Stichocapsa praepulchella Hori and Xitus gifuensis (Mizutani). The Xialu fauna is less similar to low-latitude (tropical) assemblages represented by the Mariana fauna. For this reason, the Xialu fauna is regarded as representative of a southern hemisphere middle-latitude (temperate) fauna. A mirror-image bi-temperate provincialism to the equator in radiolarian faunas is reconstructed for the Ceno-Tethys and Pacific Ocean in latest Jurassic–earliest Cretaceous time.
- Subjects
CHINA; TIBET (China); ANIMALS; CRETACEOUS paleoecology; JURASSIC paleopedology; PALEOCEANOGRAPHY
- Publication
Island Arc, 2005, Vol 14, Issue 4, p338
- ISSN
1038-4871
- Publication type
Article
- DOI
10.1111/j.1440-1738.2005.00491.x