ammonites
Itahana Fm Molluscan Fauna Locality 12 (Miocene of Japan)

Also known as Locality 12

Where: Japan (36.0° N, 139.0° E: paleocoordinates 38.7° N, 136.5° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Itahana Formation, Miocene (23.0 - 5.3 Ma)

• formations cover unconformably the Paleozoic sedimentary rocks and crystalline shists

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; lithified conglomerate and tuff

• Overlies Yoshii and Fukushima formation and underlies Akima formation.
• The Itahana formation is composed of much coarser clastic sediments than the lower two formations. Lithofacies of the formation is changable within one horizon. Most of conglomeratic layers are lens shaped. A thick tuff bed and lignite are found in the upper part. Molluscan fossils occur richly.

Primary reference: Y. Iwasaki. 1970. The Shiobara-type Molluscan Fauna: An ecological analysis of fossil molluscs. Journal of the faculty of science, University of Tokyo, Section 2 17(3):351-444 [A. Miller/K. Bulinski/K. Bulinski] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 52331: authorized by Arnold Miller, entered by Kate Bulinski on 03.08.2005