CSUN Loc. 1560a - Grays Harbor [Crescent Fm] (Eocene of the United States)

Where: Grays Harbor County, Washington (47.3° N, 123.6° W: paleocoordinates 51.3° N, 104.0° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Crescent Formation, Ypresian (56.0 - 47.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, pebbly, green, argillaceous, conglomeratic sandstone

• the main macrofossiliferous sedimentary unit is approximately 100 m thick and consists mostly of dark green, very fine to medium basaltic sandstone with rounded to subrounded grains. near the base of the unit, pebble conglomerates grade rapidly upward into coarse sandstone. intermixed with fossils are subrounded basaltic clasts that range in size from granule to medium. there are also some large pebble-sized lumpy calcareous nodules. the matrix of the pebble conglomerate is mudstone and the amount is variable.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

Primary reference: R. L. Squires and J. L. Goedert. 1994. Macropaleontology of the Eocene Crescent Formation in the Little River Area, Southern Olympic Peninsula, Washington. Contributions in Science (Natural History Museum of Los Angeles County) 444:1-32 [A. Miller/K. Layou/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5553: authorized by Arnold Miller, entered by Karen Layou on 13.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Lamniformes - Lamnidae
Isurus ? sp. Agassiz 1843 mako shark