L30. Silvies River bank, quarter mile below southern margin of Bear Valley (Jurassic of the United States)

Also known as Lupher loc. 30

Where: Grant County, Oregon (44.1° N, 119.0° W: paleocoordinates 34.9° N, 59.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Stephanoceras humphriesianum ammonoid zone, ?Weberg Member (Snowshoe Formation), Bajocian (170.3 - 168.3 Ma)

• Snowshoe Formation, probably slightly lower stratigraphically than Lupher's loc. 5.

• group of beds-level stratigraphic resolution

Environment/lithology: brown, gray, calcareous sandstone and calcareous sandstone

Size class: macrofossils

Collected by R. L. Lupher in 1927; reposited in the USNM

Primary reference: R. W. Imlay. 1973. Middle Jurassic (Bajocian) Ammonites from Eastern Oregon. United States Geological Survey Professional Paper 756:1-100 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 234036: authorized by Paul Scofield, entered by Paul Scofield on 13.03.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Otoitidae
 Ammonitida - Stephanoceratidae
 Ammonitida - Perisphinctidae