Cerdas-Atocha (Miocene to of Bolivia)

Where: Potosi, Bolivia (20.9° S, 66.2° W)

• Paleocoordinates: 20.4° S, 62.2° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Quehua Formation, Burdigalian to Burdigalian (20.4 - 13.8 Ma)

• A paleomagnetic section with associated radioisotopic dates constrains the fossiliferous horizons to ca. 16.5–15.3 Ma (late early to early middle Miocene) (MacFadden et al., 1995).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; silty, sandy claystone

• brown and reddish-brown silty clays silts, and silty sands of predominantly fluvio-lacustrin origin. Numerous interbedded, lenticular gravels also occur at Cerdas, particularly in the upper part of Section 3 were obviously not sampled for paleomagnetism.

•

Size class: mesofossils

Primary reference: B. J. MacFadden, F. Anaya, and C. C. Swisher, III. 1995. Neogene paleomagnetism and oroclinal bending of the central Andes of Bolivia. Journal of Geophysical Research 100(B5):8153-8167 [P. Mannion/M. Kouvari]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 204205: authorized by Philip Mannion, entered by Miranta Kouvari on 03.09.2019

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Notoungulata - Mesotheriidae
Microtypotherium cf. choquecotense
Microtypotherium cf. choquecotense Villarroel 1974 notoungulate