Where: Uvalde County, Texas (29.2° N, 100.0° W: paleocoordinates 34.9° N, 73.4° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Baculites sp. ammonoid zone, Anacacho Limestone Formation (Midway Group), 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.
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 3613: authorized by Mark Patzkowsky, entered by Karen Layou on 05.08.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
Echinoidea indet. Leske 1778 sea urchin | |
Bivalvia | |
Inoceramus balticus Bohm 1907 clam | |
Neithea quinquecostata Sowerby 1814 scallop | |
Lima sp. Bruguière 1797 file clam | |
Exogyra sp. Say 1820 oyster | |
Cucullaea sp. Lamarck 1801 clam | |
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