CSUN Loc. 1553a - Grays Harbor [Crescent Fm] (Eocene of the United States)

Also known as LACMIP Loc. 41553

Where: Grays Harbor County, Washington (47.1° N, 123.8° W: paleocoordinates 51.1° N, 104.3° 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, pyritic, black, argillaceous mudstone

• approximately 2 m upsection at locality 1553, there is a 3 m thick, pyritic argillaceous black mudstone with sparse macrofossils, including some hexactinellid sponges. this lithology is not present elsewhere in the study area.

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 5545: authorized by Arnold Miller, entered by Karen Layou on 12.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Polychaeta
 Sabellida - Serpulidae
"Rotularia tejonense" = Rotularia (Rotularia) tejonense
"Rotularia tejonense" = Rotularia (Rotularia) tejonense Arnold 1909
Bivalvia
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Arcida - Arcidae
Barbatia sp.
Barbatia sp. Gray 1842 clam
Barbatia sp. aff. B. landesi
 Pectinida - Pectinoidae
Spondylus carlosensis
Spondylus carlosensis Anderson 1905 scallop
 Pectinida - Propeamussiidae
Parvamussium sp.
Parvamussium sp. Sacco 1897 mud scallop
Gastropoda
 Cerithioidea - Siliquariidae
Tenagodus bajaensis
Tenagodus bajaensis Squires 1990 snail
Hexactinellida
 Hexactinosa - Aphrocallistidae
Aphrocallistes ? sp.
Aphrocallistes ? sp. Gray 1858 glass sponge