USGS 643, Raging River Formation, Hobart quadrangle (Eocene to of the United States)

Also known as USGS 643

Where: King County, Washington (47.4° N, 122.0° W: paleocoordinates 49.0° N, 106.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Raging River Formation, Lutetian to Lutetian (47.8 - 38.0 Ma)

• Formely included in Puget Group, but regarded as distinct due to lack of coal facies. Oldest sedimentary rocks in the Tiger Mountain-Taylor Mountain upland area. MacNeil (written communication) stated that there was little doubt this is a middle Eocene fauna. Probably equivalent to part of the McIntosh Formation of western Washington.

• bed-level stratigraphic resolution

Environment/lithology: marine; siltstone and sandstone

• No paleoenvironmental data presented.
• Formation is characterised by thick-bedded siltstone, sandstone, and conglomerate. No specific lithologic data presented for this collection.

Size class: macrofossils

Reposited in the USGS

Collection methods: quarrying,

• No repository for collection listed, but likely to be USNM.

Primary reference: J. D. Vine. 1969. Geology and coal resources of the Cumberland. Hobart, and Maple Valley Quadrangles, King County, Washington. United States Geological Survey Professional Paper 624:1-67 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 43345: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for mollusca. Mollusca identified by MacNeil (1959, 1960)
Gastropoda
 Cerithioidea - Turritellidae
Turritella cf. andersoni Dickerson 1916 turret shell
Bivalvia
 Cardiida - Tellinidae
Macoma sp. Leach 1819 tellin clam
 Cardiida - Veneridae
 Carditida - Crassatellidae
Crassatella wasana clam
Subspecies: Crassatella wasana cf. mathewsoni