Abstract
Chert clast-bearing epi-continental neritic-terrestrial Jurassic and Cretaceous sequences are sporadically distributed in southwestern Japan. Typical and geological entities are the Torinosu Group and Tetori Group. Radiolarian dating of chert clasts enables us to discuss denudation stages of mid Mesozoic accretionary complexes. Chert clast-dominated conglomerate can be used for identifying marine beds within terrestrial sequences.
Highlights
IntroductionMesozoic sedimentary sequences in East Asia are categorized into two types; marine accretionary complexes and epi-continental neritic-terrestrial sequences
Chert clast-dominated conglomerate can be used for identifying marine beds within terrestrial sequences
Mesozoic sedimentary sequences in East Asia are categorized into two types; marine accretionary complexes and epi-continental neritic-terrestrial sequences
Summary
Mesozoic sedimentary sequences in East Asia are categorized into two types; marine accretionary complexes and epi-continental neritic-terrestrial sequences. The accretionary complexes are distributed in the eastern margin of Asia including Russian Far East, the Japanese Islands, and the Philippines [1] [2]. The epi-continental neritic-terrestrial sequences are distributed mainly in Russian Far East, China, the Korean Peninsula, and the Japanese Islands. Oceanic rocks such as pelagic chert are typical components of accretionary complexes. They are included in neritic-terrestrial sequences as recycled clasts.
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