Minowa Quarry MW20 (Triassic of Japan)

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

• Paleocoordinates: 3.5° N, 136.4° E (Wright 2013)

• coordinate stated in text

When: Ashio Belt Group, Spathian (248.1 - 246.7 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 220562: authorized by William Foster, entered by William Foster on 09.06.2021

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Nassellaria - Archaeosemantidae
Archaeosemantis sp.
Archaeosemantis sp. Dumitrica 1982 radiolarian
 Entactinaria - Palaeoscenidiidae
Parentactinia nakatsugawaensis
Parentactinia nakatsugawaensis Sashida 1983 radiolarian
 Entactinaria - Hindeosphaeridae
Pseudostylosphaera sp.
Pseudostylosphaera sp. Kozur and Mostler 1981 radiolarian
 Entactinaria - Entactiniidae
? Copicyntra sp., Entactinosphaera chiakensis
? Copicyntra sp. Nazarov and Ormiston 1985 radiolarian
 Radiolaria -
Spumellaria sp.
Spumellaria sp. Ehrenberg 1875 radiolarian