Where: Japan (39.8° N, 141.6° E: paleocoordinates 50.1° N, 143.1° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Yokonuma Formation, Hauterivian to Hauterivian (136.4 - 125.5 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
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-NC-ND (attribution-noncommercial-no derivatives)