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)