Where: Orange County, California (34.7° N, 117.8° W: paleocoordinates 34.2° N, 105.8° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Tejon Formation, Bartonian (41.3 - 38.0 Ma)
• From upper Tejon Formation, and most likely from "Tejon" stage, or possibly the "Transition" stage. Therefore a upper Middle Eocene=Narizian=Bartonian age is assigned to the collection, although it is possibly as old as Lutetian. The Tejon Formation unconformably overlies basement, and is unconformably overlain by the Tecuya Formation (Oligocene) in this section. It is not specified which of three members this collection is from.
• formation-level stratigraphic resolution
Environment/lithology: coastal; lithified sandstone
Size class: macrofossils
Reposited in the USGS
Collection methods: quarrying,
• Collected by T.H. Nilson and W.O. Addicott. Collections likely to be reposited at USGS Menlo Park or USNM (not specified).
Primary reference: L. R. Saul and R. L. Squires. 2008. Cretaceous trichotropid gastropods from the Pacific slope of North America: Possible pathways to calyptraeid morphology. The Nautilus 122(3):115-142 [P. Wagner/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 177882: authorized by Pete Wagner, entered by Pete Wagner on 11.04.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Spirocrypta pileum Gabb 1864 snail |