Section 9, bed 12 [Hinoshima Fm] (Cretaceous of Japan)

Where: Japan (32.5° N, 130.5° E: paleocoordinates 41.6° N, 121.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hinoshima Formation, Late/Upper Santonian (85.8 - 83.5 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 Late Santonian on the basis of stratigraphic position. STRATIGRAPHIC POSITION: From bed 12, near middle of section.

• bed-level stratigraphic resolution

Environment/lithology: deltaic; poorly lithified, shelly/skeletal mudstone

• ENVIRONMENT: Bottomsets-bay, within a bayhead delta-bay.
• SPECIFIC LITHOLOGY: Shelly 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 82351: 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
 Nuculanida - Nuculanidae
Ezonuculana mactraeformis Nagao 1932 pointed nut clam
Cephalopoda
 Ammonitida - Diplomoceratidae
 Ammonitida - Tetragonitidae
Gaudryceras tenuiliratum Yabe 1903 ammonite