Hy0053 - Ofunato-Omine mine area [Hijochi Fm] (Cretaceous to of Japan)

Where: Japan (39.0° N, 141.7° E: paleocoordinates 49.8° N, 143.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hijochi Formation, Hauterivian to Hauterivian (132.9 - 125.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Hijochi Fm. AGE: Upper Neocomian; placed here in Hauterivian; justification for age not reported in text. STRATIGRAPHIC POSITION: From unknown position within the Hijochi Fm; 1.2 m thick interbedded between black shale beds

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, shelly/skeletal, calcareous sandstone

• SPECIFIC LITHOLOGY: Ill-sorted, calcareous, dark grey fine-grained sandstone; sandstone yields abundant skeletal material. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Kase

• COLLECTOR: T. Kase. REPOSITORY: Not stated in text.

Primary reference: T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91313: authorized by Austin Hendy, entered by Austin Hendy on 14.09.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Bivalvia
 Trigoniida - Megatrigonioidae
Pterotrigonia pocciliformis
Gastropoda
 Epitonioidea - Epitoniidae
Acirsa (Hemiacirsa) ofunatoensis n. sp.
 Sorbeoconcha - Cassiopidae
Cassiope (Cassiopella) ogaii n. sp.
 Sorbeoconcha - Aporrhaidae
Ceratosiphon giganteus