Where: Japan (33.7° N, 133.8° E: paleocoordinates 40.8° N, 136.0° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: B1 Member (Birafu Formation), Berriasian (145.0 - 139.8 Ma)
• bed-level stratigraphic resolution
Environment/lithology: slope; lithified sandstone
•sandstone, mudstone, limestone and alternating beds of
•sandstone and mudstone. The conglomerate contains chert,
•shale and granite pebbles. The medium grained poorly sorted
•sandstone beds contain coaly inclusions and abundant nonmarine
•and marine mollusks. Limestone beds are ooliticpeloidal
•and bioclastic grainstones (Morino, 1993). This unit
•is approximately 170 m thick.
Size classes: macrofossils, microfossils
Preservation: mold/impression
Primary reference: T. Kozai, K. Ishida, and Y. Kondo. 2006. Radiolarians, bivalves and the J/K boundary in the Birafu Formation, southern Kurosegawa Belt, Central Shikoku, SW Japan. Geosciences Journal 10(3):217-235 [M. Aberhan/D. Wellmanns]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 116560: authorized by Martin Aberhan, entered by Daniel Wellmanns on 09.09.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
| Bivalvia | |
|
Isocyprina japonica clam | |
|
Corbula imamurae clam
"Corbula globosa" = Varicorbula globosa Sowerby 1818 clam | |