Late Triassic bivalves from Sambosan accretionary complex, southwest Japan, and their biogeographic implications

Tetsuji Onoue, Hitoshi Tanaka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

This paper records eight species of Late Triassic Tethyan bivalves from the oceanic limestone and associated basaltic volcaniclastic rocks which belong to the Sambosan accretionary complex in southwest Japan. The bivalve-bearing succession consists of basaltic volcaniclastic rocks (ca. 60 m thick) conformably succeeded by dark gray bedded limestone (ca. 10 m thick), which is, in turn, overlain by massive limestone (ca. 50 m thick). The succession is dated as Carnian to Norian by means of conodonts and bivalves. Upper Triassic bivalves, including Gruenewaldia decussata, G. woehrmanni and Costatoria goldfussi, are recorded from the examined succession. Their occurrence implies a Tethyan affinity for the examined Sambosan oceanic rocks. No bivalve species characteristic of a high latitudinal zone occurs in this succession.

Original languageEnglish
Pages (from-to)15-25
Number of pages11
JournalPaleontological Research
Volume9
Issue number1
DOIs
Publication statusPublished - Apr 30 2005

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology

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