Expedition 322 was designed to investigate characteristics of incoming sedimentary strata and igneous basement at the Nankai accretionary prism. Site C0012 drilled to igneous basement through sedimentary units instead of C0011 that drilling was discontinued due to problem of drill bit.

File No. 322C0012A34R1

Expedition : 322
Site : C0012
Hole : A
Core : 34R
Section : 1

CSF Depth : 357.00m

Bioturbated silty claystone and thin clayey sitstones can be seen in this section. The age of this lithology is identified to middle Miocene (>12.0 ot <13.6 Ma). After splitting the section, many pieces of clay stones were broken due to initial cracks. Bright reflections of X-ray CT image show existence high density material in bioturbated space.

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