Iwayakannon (IW log of IY section), Inuyama, IW:+51: Middle Toarcian - Late Toarcian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polycystinea - Nassellaria - Hsuidae
Parahsuum ovale Hori and Yao 1988
Polycystinea - Nassellaria - Parvicingulidae
Praeparvicingula spp. Pessagno et al. 1993
Praeparvicingula gigantocornis (Kishida and Hisada 1985)
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
Stratigraphic resolution:bed
Stratigraphy comments: 125 cm above base of thick green shale bed.

The standard level of this section is located at the base of a thick green shale bed just below IYII 14 (6m below the top of the IY section).
Lithology and environment
Primary lithology: lithified chert
Includes fossils?Y
Environment:basinal (siliceous)
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:124808
Authorizer:J. Pálfy Enterer:A. Kocsis
Created:2012-02-24 03:14:07 Last modified:2025-02-22 15:12:02
Access level:the public Released:2012-02-24 03:14:07
Creative Commons license:CC0
Reference information

Primary reference:
40387. M. Takeuchi. 2001. Morphologic study of multicyrtid Nassellaria (Radiolaria) from the Lower Jurassic bedded cherts in the Inuyama Area, Mino Terrane, Central Japan. News of Osaka Micropaleontologists, Special Volume 12:181-189 [J. Pálfy/A. Kocsis]