Iwayakannon (IW log of IY section), Inuyama, IW:+37: 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
Carter et al. 2010
Carter et al. 2010
Polycystinea - Nassellaria - Parvicingulidae
Praeparvicingula spp. Pessagno et al. 1993
Carter et al. 2010
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: 97 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:124807
Authorizer:J. Pálfy Enterer:A. Kocsis
Created:2012-02-24 03:13:42 Last modified:2025-02-22 15:12:02
Access level:the public Released:2012-02-24 03:13:42
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]

Secondary references:

38346 E. S. Carter, S. Goričan, J. Guex, L. O'Dogherty, P. De Wever, P. Dumitrica, R. S. Hori, A. Matsuoka, and P. A. Whalen. 2010. Global radiolarian zonation for the Pliensbachian, Toarcian and Aalenian. Palaeogeography, Palaeoclimatology, Palaeoecology 297:401-419 [J. Pálfy/A. Kocsis/M. Uhen]