Section 5, bed 23 [Hinoshima Fm] (Cretaceous of Japan)

Where: Japan (32.5° N, 130.5° E: paleocoordinates 39.9° N, 120.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hinoshima Formation, Early/Lower Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Hinoshima Fm, which locally unconformably overlies granitic rocks, and is overlain by the Amura Fm (Campanian) AGE: Late Santonian-Campanian. Here assigned to Early Campanian on the basis of stratigraphic position. STRATIGRAPHIC POSITION: From bed 23, near middle of section.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; poorly lithified, shelly/skeletal, conglomeratic mudstone

• ENVIRONMENT: Slope environment, siliciclastic setting.
• SPECIFIC LITHOLOGY: Shelly conglomeratic mudstone. LITHIFICATION: Poorly-lithified on the basis of figured specimens.

Size class: macrofossils

Collected by Komatsu et al.

Collection methods: bulk, surface (in situ),

• COLLECTORS: Komatsu et al. REPOSITORY: KMSP, Faculty of Science, Kumamoto University, Japan.

Primary reference: T. Komatsu, M. Ono, H. Naruse and T. Kumagae. 2008. Upper Cretaceous depositional environments and bivalve assemblages of far-east Asia: the Himenoura Group, Kyushu, Japan. Cretaceous Research 29:489-508 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 82342: authorized by Austin Hendy, entered by Austin Hendy on 26.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia and ammonoidea. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identfications.
Bivalvia
 Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814 clam
 Arcida - Glycymerididae
 Trigoniida - Trigoniidae
"Apiotrigonia minor" = Megatrigonia (Apiotrigonia)
"Apiotrigonia minor" = Megatrigonia (Apiotrigonia) clam