CSUN Loc. 1554 - 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; lithified, pebbly, shelly/skeletal, green, argillaceous conglomerate and lithified limestone

• 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. at csun 1553, macrofossils make up as much as 30 percent of the clasts and form a coquina. 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 5546: 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
Thecostraca
 Pollicipomorpha - Zeugmatolepadidae
Aporolepas sp.
Aporolepas sp. Withers 1953 barnacle
Polychaeta
 Sabellida - Serpulidae
"Rotularia tejonense" = Rotularia (Rotularia) tejonense
"Rotularia tejonense" = Rotularia (Rotularia) tejonense Arnold 1909
Rhynchonellata
 Terebratulida - Cancellothyrididae
Terebratulina weaveri
Terebratulina weaveri
Terebratulina unguicula weaveri
 Terebratulida - Terebratulidae
Gryphus ? sp.
Gryphus ? sp. Megerle von Mühlfeld 1811
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp.
Dentalium sp. Linnaeus 1758 tusk shell
Bivalvia
 Nuculida - Nuculidae
Acila decisa
Acila decisa Conrad 1855 divaricate nutclam
 Ostreida - Malleidae
Nayadina batequensis
Nayadina batequensis Squires 1990 oyster
 Ostreida - Ostreidae
Ostrea sp.
Ostrea sp. Linnaeus 1758 oyster
 Pectinida - Propeamussiidae
Parvamussium sp.
Parvamussium sp. Sacco 1897 mud scallop
 Pectinida - Pectinoidae
Spondylus carlosensis
Spondylus carlosensis Anderson 1905 scallop
 Arcida - Glycymerididae
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Carditida - Carditidae
Venericardia sp.
Venericardia sp. Lamarck 1801 clam
Gastropoda
 Trochoidea - Turbinidae
Homalopoma sp.
Homalopoma sp. Carpenter 1864 snail
Homalopoma sp. cf. H. umpquaensis
 Lepetellida - Fissurellidae
Diodora sp.
Diodora sp. Gray 1821 snail
 Patellida - Lottiidae
Patelloida ? sp., Erginus vaderensis
Patelloida ? sp. Quoy 1834 limpet
Patelloida ? sp. cf. P. vokesi
Erginus vaderensis Lindberg 1979 limpet