Ks0003 - Kesennuma area [Yokonuma Fm] (Cretaceous to of Japan)

Where: Japan (39.8° N, 141.6° E: paleocoordinates 50.5° N, 142.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Yokonuma Fm. AGE: Upper Neocomian; placed here in Hauterivian-Barremian by enterer; justification for age not reported in text. STRATIGRAPHIC POSITION: From unknown position within the Yokonuma Fm; limestone of 2 m thickness, between sandstone beds.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, black, sandy limestone

• SPECIFIC LITHOLOGY: Black sandy limestone; skeletal. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collection methods: COLLECTOR: T. Oji, H. Maeda, and 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 91331: authorized by Austin Hendy, entered by Austin Hendy on 15.09.2009

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
Echinoidea
  -
Echinoidea indet.
Echinoidea indet. Leske 1778 sea urchin
Gastropoda
 Trochoidea - Nododelphinulidae
Metriomphalus aff. coquandi
 Heterostropha - Nerineidae
? Nerinoides oshimensis
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834