Where: Kanto, Japan (36.5° N, 139.6° E: paleocoordinates 36.4° N, 116.5° E)

• coordinate stated in text

When: Ashio Belt Group, Spathian (251.3 - 247.2 Ma)

Environment/lithology: basinal (siliceous); lithified chert

Size class: microfossils

Preservation: original silica

Collection methods: bulk, chemical,

Primary reference: N. Suzuki, N. Akiba, and H. Kanoh. 2002. Late Olenekian Radiolarians from Bedded Chert of Ashio Terrane Northeast Japan and Faunal Turnovers in Western Panthalassa during Early Triassic. Journal of China University of Geosciences 13(2):124-140 [W. Foster/W. Foster]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 220566: authorized by William Foster, entered by William Foster on 09.06.2021

Creative Commons license: CC BY (attribution)