Sample #93WR13 - Days Creek Formation (Oregon) (Cretaceous of the United States)

Also known as Record 67

Where: Douglas County, Oregon (43.0° N, 123.1° W: paleocoordinates 41.2° N, 72.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Days Creek Formation, Valanginian (139.8 - 132.9 Ma)

• From Days Creek Formation. This is possibly a component of the Myrtle Group. The Myrtle Group consists of Late Jurassic and Early to Middle Cretaceos turbidite and mass flow deposits considered to be either arc basin and or post-orogenic flysch basins syntectonic with waning phases of arc collapse. Macrofossil biostratigraphy suggests an Early-Middle Valanginian age.

• bed-level stratigraphic resolution

Environment/lithology: basinal (); lithified wackestone

• No environmental interpetation, though given basinal lithofacies are described, a basinal (siliciclastic) environment is chosen by enterer. "Turbidite and mass flow deposits considered to be either arc basin and or post-orogenic flysch basins syntectonic with waning phases of arc collapse"
• Turbidite and mass flow deposits

Size class: macrofossils

Collection methods: quarrying,

• Unknown collector (WR?). Collections presumably reposited at USGS Menlo Park or USNM.

Primary reference: R. E. Wells, A. S. Jayko, A.R. Niem, G. Black, T. Wiley, E. Baldwin, K. Molenaar, K.L. Wheeler, C.B. DuRoss and R.W. Givler. 2000. Geologic Map and Database of the Roseburg 30 x 60' Quadrangle, Douglas and Coos Counties, Oregon. United States Geological Survey Open-File Report 00-367 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52308: authorized by Austin Hendy, entered by Austin Hendy on 03.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Unknown identifier.
Bivalvia
 Carditida - Carditidae
Venericardia sp. Lamarck 1801 clam
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella buwaldana Dickerson 1916 turret shell
Subspecies: Turritella buwaldana coosensis
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium stentor Anderson and Hanna 1925 tusk shell
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell