Where: Sonora, Mexico (30.7° N, 112.6° W: paleocoordinates 11.6° N, 53.9° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Antimonio Formation, Late/Upper Triassic (237.0 - 201.4 Ma)
• The strata of the Monos and Antimonio Formations at Sierra del Alamo represents a nearly complete succession of marine sedimentary rock that ranges from Late Permian to Early Jurassic age.
• group of beds-level stratigraphic resolution
Environment/lithology: offshore shelf; lithified, calcareous sandstone
Size class: macrofossils
Primary reference: D. H. Goodwin. 1999. Paleontology, Paleoecology, and Depositional Environments Within the Upper Triassic (Norian) Carbonate Strata of the Antimonio Formation, Northwest Sonora, Mexico. University of Montana [D. Bottjer/N. Bonuso/N. Bonuso]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 41020: authorized by David Bottjer, entered by Nicole Bonuso on 05.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Gryphaea sp. Lamarck 1801 oyster | |
Gervillaria sp. Cox 1951 oyster | |
Palaeocardita peruviana Cox 1949 clam | |
Septocardia sp. Hall 1877 cockle | |
Myophorigonia jaworskii Steinmann 1929 clam |