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Mino Terrane, Nanjo Massif, Imajo Unit, sample MNA-10 (Jurassic of Japan)

Where: Japan (35.8° N, 136.2° E: paleocoordinates 46.2° N, 144.8° E)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Early/Lower Toarcian (183.0 - 182.0 Ma)

Environment/lithology: basinal (siliceous); lithified, cherty/siliceous mudstone

• Manganese band in a siliceous mudstone layer. This band contains manganese carbonate spherules ranging from 0.5 to 2.0 mm in diameter. The band has a lenticular shape with maximum thickness of 20 cm. This band contains manganese carbonate spherules rangin 0.5-2.0mm in diameter from which well preserved radiolarian tests were extracted.

Size class: microfossils

Primary reference: A. Matsuoka. 1991. Early Jurassic Radiolarians from the Nanjo Massif in the Mino Terrane, central Japan. Part 1. Tricolocapsa, Stichocapsa, and Minocapsa, n. gen. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 161:720-738 [J. Pálfy/A. Kocsis] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 124830: authorized by József Pálfy, entered by Adam Kocsis on 24.02.2012