ammonites
Toyoma Formation - Maehama coast, Miyagi Prefecture (Permian of Japan)

Where: Miyagi, Japan (38.7° N, 141.4° E: paleocoordinates 29.2° N, 117.1° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Toyoma Formation, Wuchiapingian (259.0 - 254.0 Ma)

• STRATIGRAPHIC RELATIONS: Shale of Toyoma Fm unconformably underlies Early Triassic Hiraiso Fm.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, black, sandy shale

• ENVIRONMENT: No environmental data reported, though dark shale suggests siliciclastic offshore paleoenvironment. TECTONIC SETTING: No tectonic data reported. SEQUENCE STRATIGRAPHY: No sequence stratigraphic data reported.
• SPECIFIC LITHOLOGY: Massive black shale with a subordinate amount of lenticular thin sandstone beds. LITHIFICATION: Lithified, based on figured specimens.

Size class: macrofossils

Collection methods: quarrying,

• COLLECTOR: Unknown, presumably M. Ehiro. REPOSITORY: IGPS (Institute of Geology and Paleontology, Graduate School of Sciences, Tohoku University).

Primary reference: M. Ehiro. 2001. Some addition Wuchiapingian (Late Permian) ammonoids from the Southern Kitakami Massif, Northeast Japan. Paleontological Research 5(2):111-114 [A. Miller/A. Hendy] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61934: authorized by Austin Hendy, entered by Austin Hendy on 08.07.2006

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)