Where: Sonora, Mexico (31.2° N, 110.5° W: paleocoordinates 5.2° N, 38.1° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Colina Formation, Kungurian (279.3 - 272.3 Ma)
• The Lower Permian strata exposed in the stratigraphic window at Rancho La Cueva is divided into three units by the authors from base to top, Lower Permian Colina Limestone, Lower Permian Epitaph Dolomite, and Lower Permian Scherrer Formation. Approximate thickness of Colina Limestone is 235 m.
• group of beds-level stratigraphic resolution
Environment/lithology: shallow subtidal; lithified lime mudstone
Size classes: macrofossils, mesofossils
Preservation: replaced with silica
Collection methods: chemical,
• Repository: Estacion Regional del Noroeste del Instituto de Geologia—UNAM, Hermosillo, Sonora, Mexico (ERNO)
Primary reference: R. B. Blodgett, T. E. Moore, and F. Gray. 2002. Stratigraphy and paleontology of Lower Permian rocks north of Cananea, northern Sonora, Mexico. Journal of South American Earth Sciences 15:481-495 [T. Olszewski/L. Fall/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 52096: authorized by Tom Olszewski, entered by Leigh Fall on 21.07.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Straparollus sp. de Montfort 1810 snail | |
Glyptospira sonorensis n. sp., Amaurotoma sp.
Glyptospira sonorensis n. sp. Blodgett et al. 2002 snail | |
Anomphalus sp. Meek and Worthen 1866 snail | |
Trachydomia sp. Meek and Worthen 1866 snail | |
cf. Apachella arizonensis Winters 1963 snail | |
Worthenia sp. de Koninck 1883 snail | |
Bivalvia | |
Edmondia sp. de Koninck 1841 clam | |
Strophomenata | |