Raga Hiraiga, Japan: Late Aptian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia
Anthozoa - Scleractinia - Amphiastreidae
Anthozoa - Scleractinia - Eugyridae
Echinoidea
unclassified
Brachiopoda indet. Cuvier 1805
Bivalvia
Bivalvia - Hippuritida - Polyconitidae
unclassified
Foraminifera indet. Eichwald 1830
Florideophyceae - Hapalidiales - Corallinophycidae
End reef builders
see common names

Geography
Country:Japan
Coordinates: 39.9° North, 141.9° East (view map)
Paleocoordinates:48.2° North, 151.2° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
10 m.y. bin: Cretaceous 2-3
*Period:Early/Lower Cretaceous
*International age/stage:Late/Upper Aptian
Key time interval: Late Aptian
Age range of interval: 119.57 - 113.2 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Miyako Formation:Tanohata
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: lithified framestone
Lithology description: 50 x 20 x 1 m outcrop of coral-rudist limestone with coral-dominated parts and rudist-coral parts (in situ). Micritic matrix with algae, foraminifers and many andesitic grains and epigenetic pyrite
Environment:reef, buildup or bioherm
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:peel or thin section,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Many more corals identified by Eguchi (1951) from the Miyako Group. Included are only those mentioned in cited paper
Metadata
Also known as:Reef 1216
Database number:26197
Authorizer:W. Kiessling Enterer:W. Kiessling
Modifier:W. Kiessling Research group:marine invertebrate
Created:2002-10-08 06:04:27 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-10-08 06:04:27
Creative Commons license:CC0
Reference information

Primary reference:
7260. S.-I. Sano. 1991. Discovery of a coral-rudist buildup in the Miyako Group, Northeast Japan. Transactions and Proceedings of the Palaeontological Society of Japan, New Series 162:794-800 [W. Kiessling/W. Kiessling/W. Kiessling]