USGS Mesozoic 29828. Gulch slightly northeast of old Washburn place (Jurassic of the United States)

Also known as Lupher 207

Where: Grant County, Oregon (44.5° N, 119.5° W: paleocoordinates 35.0° N, 59.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Sonninia sowerbyi ammonoid zone, Weberg Member (Snowshoe Formation), Early/Lower Bajocian (171.6 - 168.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: limestone

• Limestone, thin-bedded, upper 40 feet contains some hard limestone ledges, lower 20 feet is softer and rather poorly exposed. Limestone beds from 40 to 50 feet above base contain Sonninia (Eulwplocera8), Witchellia (Latiu;Uchellia), J?ontannesia, Docidocera8, and Asthenoceras

Size class: macrofossils

Collected by R. L. Lupher in 1928; 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 202846: authorized by Pete Wagner, entered by Pete Wagner on 22.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Sonniniidae
Sonninia (Euhoploceras) modesta, Sonninia (Euhoploceras) polyacantha, Fontannesia costula, Asthenoceras delicatum, "Witchellia (Latiwitchellia) evoluta n. sp." = Witchellia, "Pelekodites webergi" = Witchellia
"Witchellia (Latiwitchellia) evoluta n. sp." = Witchellia ammonite
"Pelekodites webergi" = Witchellia ammonite
 Ammonitida - Otoitidae
"Docidoceras lupheri" = Mollistephanus lupheri
"Docidoceras lupheri" = Mollistephanus lupheri Imlay 1973 ammonite