USGS 648, Raging River Formation, Hobart quadrangle (Eocene to of the United States)

Also known as USGS 648

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. Probably lowermost collection of Raging River Formation. 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. Collection is from probably up to 1000 ft below the top of the formation.

• 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 43347: 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)
Bivalvia
 Ostreida - Pteriidae
Pteria cf. pellucida Gabb 1864 pearl oyster
 Mytilida - Mytilidae
Mytilus dichotomus Cooper 1894 mussel
 Cardiida - Ungulinidae
"? Taras sp." = Diplodonta
"? Taras sp." = Diplodonta Bronn 1831 clam
 Cardiida - Veneridae
Pitar sp. Römer 1857 venus clam
Pitar (cf. Lamelliconcha) eocenica Weaver and Palmer 1922 venus clam
 Cardiida - Cardiidae
 Solenida - Solenidae
Solena sp. Mörch 1853 clam
Gastropoda
 Cephalaspidea - Philinidae
 Neogastropoda - Buccinidae
Pseudoliva lineata Gabb 1864 true whelk
 Sorbeoconcha - Turritellidae
Cristispira pugetensis Allison 1965 turret shell
Turritella sp. Lamarck 1799 turret shell
Small form similar to both T. buwaldana coosensis and T. wasana hendoni
Turritella cf. buwaldana Dickerson 1916 turret shell
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium cf. stramineum Gabb 1864 tusk shell
Echinoidea
 Spatangoida - Brissidae