Where: Japan (35.4° N, 137.0° E: paleocoordinates 47.4° N, 147.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Parahsuum simplum assemblage-zone zone, Hettangian to Hettangian (201.3 - 182.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified chert and lithified mudstone

Size class: microfossils

Preservation: original silica

Collection methods: chemical, hydroflouric

Primary reference: R. Hori. 1990. Lower Jurassic Radiolarian Zones of SW Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 159:562-586 [J. Pálfy/A. Kocsis]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 120181: authorized by József Pálfy, entered by Adam Kocsis on 08.11.2011

Creative Commons license: CC BY (attribution)