Minowa Quarry MW24: Spathian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polycystinea - Spumellaria
Spumellaria spp. Ehrenberg 1875
Polycystinea - Spumellaria - Pantanelliidae
? Pantanellium sp. Pessagno 1977
Protozoa - Entactinaria - Entactiniidae
? Copicyntra sp. Nazarov and Ormiston 1985
Protozoa - Actinommidae
see common names

Geography
Country:Japan State/province:Kanto
Coordinates: 36.5° North, 139.6° East (view map)
Paleocoordinates:3.5° North, 136.4° East (Wright 2013)
Basis of coordinate:stated in text
Time
Period: Triassic Epoch: Early Triassic
Stage: Olenekian 10 m.y. bin: Triassic 1
Key time interval: Spathian
Age range of interval: 248.6 - 247 m.y. ago
Stratigraphy
Geological group:Ashio Belt
Local section:Minowa Quarry Local bed:Unit 4
Lithology and environment
Primary lithology: lithified chert
Environment:basinal (siliceous)
Taphonomy
Modes of preservation:body,original silica
Size of fossils:microfossils
Collection methods and comments
Collection methods:bulk,chemical,field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:220566
Authorizer:W. Foster Enterer:W. Foster
Research group:micropaleontology
Created:2021-06-09 13:12:41 Last modified:2025-02-22 15:12:02
Access level:the public Released:2021-06-09 13:12:41
Creative Commons license:CC0
Reference information

Primary reference:
77092. 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]