Where: Salta, Argentina (25.6° S, 65.7° W: paleocoordinates 26.0° S, 61.9° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Angastaco Formation, Langhian (16.0 - 13.8 Ma)
• Radiometric ages from the Angastaco Formation (13.4 Ma; Grier and Dallmeyer, 1990) and the Anta Formation (14.4 and 14.1 Ma; Reynolds et al., 1994) date the basal half of the megasequence as Middle Miocene. This age, is supported by scarce fossil remains in the Angastaco Formation assigned to a Friasense±Chasiquense mammal age (Middle to Upper Miocene; Diaz et al., 1986; Miserendino and Diaz, 1988). Vergani and Starck (1989a) and Starck and Vergani (1996) postulate a `best ®t' age between 15 and 10 Ma.
•
•This collection had a Friasian - Chasicoan age assigned. But the Angastaco formation has a 13.4Ma age (Langhian).
Environment/lithology: terrestrial; sandstone
•CalchaquõÂ Valley by the Angastaco Formation, with more than 3 km of reddish and brownish strata. This unit comprises a basal, eolian, sandy member up to 600 m thick (Fig. 3a) and an upper, coarsening-up, conglomeratic member whose detri- tuswas derived froman orogenic front located to thewest.
Size classes: macrofossils, mesofossils
Primary reference: D. Starck and L. M. Anzotegui. 2001. The late Miocene climatic change - persistence of a climatic signal through the orogenic stratigraphic record in northwestern Argentina. Journal of South American Earth Sciences 14:763-774 [P. Mannion/M. Kouvari]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 206039: authorized by Philip Mannion, entered by Miranta Kouvari on 29.10.2019
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
| Mammalia | |
|
Mesotheriinae indet. Alston 1876 notoungulate | |