Where: Sonora, Mexico (30.7° N, 112.6° W: paleocoordinates 17.2° N, 55.3° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Lower Member (Sierra de Santa Rosa Formation), Hettangian to Hettangian (201.3 - 190.8 Ma)
• Sequence X; stratigraphy based on ammonites.
• group of beds-level stratigraphic resolution
Environment/lithology: open shallow subtidal; lithified, gray limestone and lithified, fine-grained mudstone
Size class: macrofossils
Preservation: cast, mold/impression
Collection methods: bulk, surface (float),
Primary reference: A. Scholz, M. Aberhan, and C.M. León. 2008. Early Jurassic bivalves of the Antimonio terrane (Sonora, NW Mexico): Taxonomy, biogeography, and paleogeographic implications. Geological Society of America Special Paper 442:269-312 [A. Miller/S. Kolbe/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 115210: authorized by Arnold Miller, entered by Sarah Kolbe on 31.08.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
| Bivalvia | |
|
? Cardinia "sp. A" Agassiz 1841 clam
Cardinia concinna Sowerby 1819 clam | |
|
Neocrassina gueuxi d'Orbigny 1850 clam | |
|
Lucinidae indet. Fleming 1828 clam | |
|
Protocardia truncata Sowerby 1827 cockle | |
|
Modiolus cf. baylei mussel | |
|
Grammatodon sulcatus Aberhan 1994 clam | |
|
Agerchlamys wunschae Marwick 1953 scallop | |
|
Weyla unca Philippi 1899 scallop | |