Where: Orange County, California (33.7° N, 117.6° W: paleocoordinates 39.4° N, 87.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Holz Shale Member (Ladd Formation), Middle Campanian (83.5 - 70.6 Ma)

• Ladd Formation, Holz Shale Member, uppermost sandstone bed, early middle Campanian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by L.J. Czel in 1957; reposited in the LACM

Primary reference: W. P. Elder and L. R. Saul. 1996. Taxonomy and biostratigraphy of Coniacian through Maastrichtian Anchura (Gastropoda; Aporrhaiidae) of the North American Pacific slope. Journal of Paleontology 70(3):381-399 [M. Patzkowsky/K. Layou/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185179: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2017

Creative Commons license: CC BY (attribution)