CSUN Loc. 1553 - Little River [Crescent Fm] (Eocene of the United States)

Also known as LACMIP Loc. 41553

Where: Grays Harbor County, Washington (47.3° N, 123.5° 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, calcareous 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 5544: authorized by Arnold Miller, entered by Karen Layou on 12.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

 Scalpelliformes - Scalpellidae
Aporolepas sp. Withers 1953 barnacle
 Terebratulida - Terebratulidae
Gryphus ? sp. Megerle von Mühlfeld 1811
 Terebratulida - Cancellothyrididae
Terebratulina weaveri
Terebratulina unguicula weaveri
 Craniida - Craniidae
 Sabellida - Serpulidae
 Arcida - Arcidae
Barbatia sp. Gray 1842 clam
Barbatia sp. aff. B. landesi
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
Glycymeris sp. cf. G. crescentensis
Glycymeris sagittata Gabb 1864 clam
 Pectinida - Pectinoidae
Spondylus carlosensis Anderson 1905 scallop
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Ostreida - Malleidae
 Mytilida - Mytilidae
Brachidontes cowlitzensis Weaver and Palmer 1922 mussel
 Carditida - Carditidae
Venericardia sp. Lamarck 1801 clam
 Pholadida - Corbulidae
Corbula dickersoni Weaver and Palmer 1922 clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Nuculida - Nuculidae
Acila decisa Conrad 1855 divaricate nutclam
 Patellogastropoda - Lottiidae
Erginus vaderensis Lindberg 1979 limpet
Patelloida ? sp. Quoy 1834 limpet
Patelloida ? sp. cf. P. vokesi
 Neogastropoda - Nassariidae
Colwellia sp. Nuttall and Cooper 1973 snail
 Neogastropoda - Volutidae
Lyria andersoni Waring 1917 volute
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Velutinoidea - Triviidae
Eratotrivia crescentensis Weaver and Palmer 1922 snail
 Calyptraeoidea - Calyptraeidae
Calyptraea diegoana Conrad 1857 slipper shell
 Sorbeoconcha - Siliquariidae
Tenagodus bajaensis Squires 1990 snail
 Sorbeoconcha - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
 Turbinoidea - Turbinidae
Homalopoma sp. Carpenter 1864 snail
Homalopoma sp. cf. J. umpquaensis domenginensis
 Fissurelloidea - Fissurellidae
Diodora sp. Gray 1821 snail
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
 Lamniformes - Odontaspididae
Palaeohypotodus sp. Glükman 1964 sand tiger shark
 Hexactinosa - Aphrocallistidae
Aphrocallistes ? sp. Gray 1858 glass sponge
 Scleractinia - Dendrophylliidae
Balanophyllia variabilis Nomland 1916 stony coral
 Scleractinia - Faviidae
? Leptastrea hertleini Durham 1942 stony coral
 Scleractinia - Caryophylliidae
Trochocyathus crooki Merriam and Turner 1937 stony coral
 Scleractinia - Flabellidae
Flabellum californicum Vaughan 1900 stony coral