Where: Oaxaca, Mexico (16.9° N, 96.4° W: paleocoordinates 17.4° N, 93.6° W)
• coordinate stated in text
• local area-level geographic resolution
When: Matatlán Formation, Early/Lower Barstovian (16.3 - 12.5 Ma)
• "several localities... from the unit's lower part, within a ~30 m thick zone" (Bravo-Cuevas and Ferrusquía-Villafranca 2006)
•K-Ar dates of 15.3 +/- 0.8 and 16.0 +/- 0.8 Ma on the underlying Mitla Tuff (Bravo-Cuevas and Ferrusquía-Villafranca 2006); dates earlier reported as K-Ar dates of 14.4 +/- 0.4 to 16.0 +/- 0.4 Ma
• member-level stratigraphic resolution
Environment/lithology: terrestrial; poorly lithified, tuffaceous, argillaceous, conglomeratic sandstone
Size class: macrofossils
Primary reference: I. Ferrusquia-Villafranca. 1990. Biostratigraphy of the Mexican Continental Miocene: Part I, Introduction and the Northwestern and Central Faunas. Part II, The Southeastern (Oaxacan) Faunas. Part III, The Southeasternmost (Chiapasan) Fauna and Concluding Remarks On the Discussed Vertebrate Record. Paleontologia Mexicana 56:1-149 [J. Alroy/J. Alroy/J. Marcot]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 18735: authorized by John Alroy, entered by John Alroy on 27.07.1994
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Rhinocerotidae indet. Gray 1821 rhinoceros | |
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Camelidae indet. Gray 1821 camel | |
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