Torinosu Peninsula crinoids: Early Miocene - Middle Miocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Ostreidae
Crinoidea - Comatulida - Calometridae
unclassified
Skolithos sp. Haldemann 1840
see common names

Geography
Country:Japan
Coordinates: 39.0° North, 141.7° East (view map)
Paleocoordinates:39.0° North, 138.7° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5
Key time interval: Early Miocene - Middle Miocene
Age range of interval: 23.04 - 11.63 m.y. ago
Stratigraphy
Geological group:Tanabe Formation:Shirahama Member:M2
Stratigraphic resolution:bed
Stratigraphy comments: from a single bedding plane "in the middle part (the M2 Member) of the Shirahama Formation... late Early to early Middle Miocene (ca. 16 Ma)"
Lithology and environment
Primary lithology:"cross stratification" lithified conglomeratic sandstone
Lithology description: fossils are from "large [medium-grained conglomeratic] sandstone slabs" from a 2.8 section with "alternating beds of fine-grained and medium-grained sandstone... The fine-grained sandstone is usually muddy, associated in places with bluish-gray mudstone, and contains carbonaceous matter. The beds are occasionally cross-stratified. The medium-grained sandstone is well consolidated... poorly sorted, and sometimes conglomeratic"
Environment:coastal indet.
Geology comments: "shallow upper shelf... represents a high-energy paleoenvironment"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Temporal resolution:snapshot
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: National Science Museum, Tokyo collection
Metadata
Also known as:Tanabe Bay
Database number:90777
Authorizer:J. Alroy Enterer:J. Alroy
Research group:marine invertebrate
Created:2009-08-16 15:47:03 Last modified:2025-02-22 15:12:02
Access level:the public Released:2009-08-16 15:47:03
Creative Commons license:CC0
Reference information

Primary reference:
30551. T. F. Shibata and T. Oji. 2007. Kiimetra miocenica, a new genus and species of the family Calometridae (Echinodermata : Crinoidea) from the Middle Miocene of southwestern Japan. Journal of Paleontology 81(2):397-404 [J. Alroy/J. Alroy]