Kurusu (KU) Section, Inuyama, KU (a) 2: Middle Toarcian - Late Toarcian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Protozoa - Entactinaria - Saturnalidae
Polycystinea - Nassellaria - Hsuidae
Polycystinea - Spumellaria - Pantanelliidae
Zartus sp. Pessagno and Blome 1980
Trillus sp. Pessagno and Blome 1980
see common names

Geography
Country:Japan
Coordinates: 35.4° North, 137.0° East (view map)
Paleocoordinates:45.4° North, 161.1° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Jurassic Epoch: Early Jurassic
Stage: Toarcian 10 m.y. bin: Jurassic 3
Key time interval: Middle Toarcian - Late Toarcian Zone:  Hexasaturnalis hexagonus assemblage-zone
Age range of interval: 182.9 - 174.7 m.y. ago
Stratigraphy
Local section:Kurusu Local bed:KU (a) 2
Lithology and environment
Primary lithology:gray,green,red lithified chert
Secondary lithology: lithified mudstone
Lithology description: This section is composed of a rhythmically interbedded sequence of chert and mudstone. The thickness of individual chert layer varies from 1 to 7 cm (mostly 4-4,5 cm), and the mudstone layer is very thin (mostly 1-3mm). The chert exhibits a wide range of color, varying from mostly gray and green to partly red. In these chert layers, some sedimentary structures such as convolute lamination are observed.
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:120074
Authorizer:J. Pálfy Enterer:A. Kocsis
Created:2011-11-06 20:22:09 Last modified:2025-02-22 15:12:02
Access level:the public Released:2011-11-06 20:22:09
Creative Commons license:CC0
Reference information

Primary reference:
38434. R. Hori. 1988. Some characteristic radiolarians from Lower Jurassic bedded cherts of the Inuyama area, Southwest Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 151:543-563 [J. Pálfy/A. Kocsis]