Where: Medina County, Texas (29.4° N, 98.9° W: paleocoordinates 34.9° N, 72.1° W)

• small collection-level geographic resolution

When: Baculites sp. (weak flank ribs) - Baculites sp. (smooth) ammonoid zone, Anacacho Limestone Formation, Early/Lower Campanian to Early/Lower Campanian (83.5 - 70.6 Ma)

• Swezey and Sullivan (2004) correlate the Anacacho LS to the Baculites sp. (weak flank ribs), Baculites sp. (smooth) zone, which is late upper Campanian in Gradstein et al., 2004, through the Baculites maclearni zone., which is middle Campanian in Gradstein et al., 2004.

• member-level stratigraphic resolution

Environment/lithology: marine; carbonate

Size class: mesofossils

Reposited in the USGS

Primary reference: W. P. Elder. 1996. Bivalves and Gastropods from the Middle Campanian Anacacho Limestone, south central Texas. Journal of Paleontology 70(2):247-271 [M. Patzkowsky/K. Layou/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 3611: authorized by Mark Patzkowsky, entered by Karen Layou on 05.08.1999

Creative Commons license: CC BY (attribution)