Agnevskaya Suite - Agnevo River, Alesksandrovsk-Sakhalinsky District, Sakhalin (Miocene of Russian Federation)

Where: Russian Federation (50.6° N, 142.0° E: paleocoordinates 51.1° N, 140.2° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Agnevskaya Formation (Dagi Group), Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From Agnevskaya suite of the "Dagi" horizon, which lies between the "Uynin" (Early Miocene) and "Okobykay" (Late Miocene) horizons. THICKNESS: Total thickness of unit is 500 m. AGE: upper Early Miocene-Miocene, on the basis of classification into the "Dagi" horizon. STRATIGRAPHIC POSITION: Composite checklist for formation in this area.

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified, silty, sandy, carbonaceous tuff

• ENVIRONMENT: Not stated in text; assumed to be cool-water shallow-water siliciclastic setting on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Tuffs, tuff breccia, siltstones, sandstones and coals. LITHIFICATION: Lithified, assumed on the basis of age and facies.

Size class: macrofossils

Collection methods: COLLECTOR: Unknown, presumably Tikhonovich (c. 1925). REPOSITORY: Unknown repository.

Primary reference: A. I. Kafanov and K. Ogasawara. 2003. Neogene and Paleogene Molluscan (Bivalvia) Cenozones of Sakhalin and Kurile Islands. Science Reports, Institute of Geoscience, University of Tsukuba 24:45-79 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 70443: authorized by Austin Hendy, entered by Austin Hendy on 22.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Only characteristic bivalvia listed. NOMENCLATURE: Not an authoritative publication, but nomenclature revised by specialists, with species and subgenus-level identifications.
Bivalvia
 Mytilida - Mytilidae
Crenomytilus cf. expansus, "Mytilus (Tumidimytilus) ochotensis" = Mytilus ochotensis
Crenomytilus cf. expansus Arnold 1907 mussel
"Mytilus (Tumidimytilus) ochotensis" = Mytilus ochotensis Slodkewitsch 1936 mussel
 Pectinida - Pectinoidae
Chlamys (Chlamys) cf. kavranensis Sinelnikova 1975 scallop