Loc. M-51 - River Kajisako [Kajisako Fm]: Late Turonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Trigoniida - Megatrigoniidae
C category
Bivalvia - Pectinida - Pectinidae
C category
Bivalvia - Myalinida - Inoceramidae
Matsumoto et al. 1982 C category
Matsumoto et al. 1982 R category
Inoceramus (Inoceramus) teshioensis Nagao and Matsumoto 1939
Matsumoto et al. 1982 A category
Matsumoto et al. 1982 R category
Cephalopoda - Ammonitida - Acanthoceratidae
Matsumoto 1982 R category
Cephalopoda - Ammonitida - Diplomoceratidae
Scalarites sp. Wright and Matsumoto 1954
Matsumoto 1982 R category
see common names

Geography
Country:Japan County:Shikoku
Coordinates: 33.8° North, 134.0° East (view map)
Paleocoordinates:40.0° North, 137.2° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Turonian 10 m.y. bin: Cretaceous 6
Key time interval: Late Turonian
Age range of interval: 93.9 - 89.8 m.y. ago
Stratigraphy
Formation:Kajisako
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Kajisako Fm, which overlies the Nagase Fm. AGE: Late Turonian, on the basis of ammonite, inoceramid, and radiolarian biostratigraphy. STRATIGRAPHIC POSITION: From the upper lithostratigraphic unit in regional section; middle part of Kajisako Fm.
Lithology and environment
Primary lithology:fine poorly lithified sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Fine-grained sandstone. LITHIFICATION: Poorly lithified, on the basis of figured specimens and facies description.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow marine siliciclastic setting.
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTOR: Multiple collectors. REPOSITORY: Dept. of Geology, Kyushu University, Japan.
Taxonomic list comments:COVERAGE: Probably not exhaustive, but including ammonoidea, inoceramids, bivalves, and radiolarians. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications.
Metadata
Database number:87013
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2009-02-27 21:01:04 Last modified:2025-02-22 15:12:02
Access level:the public Released:2009-02-27 21:01:04
Creative Commons license:CC0
Reference information

Primary reference:
29274. M. Tashiro and T. Kozai. 1982. Part V. Bivalve fossils from the Upper Cretaceous of the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:69-92 [A. Hendy/A. Hendy]

Secondary references:

29273 T. Matsumoto. 1982. Part V. Upper Cretaceous ammonites from the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:31-55 [A. Hendy/A. Hendy]
29279 T. Matsumoto, M. Noda, and T. Kozai. 1982. Part VI. Upper Cretaceous inoceramids from the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:53-68 [A. Hendy/A. Hendy]