Also known as Hermosense Tipico FM Facies
Where: Buenos Aires, Argentina (39.0° S, 61.7° W: paleocoordinates 39.1° S, 60.3° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Montehermosan mammal zone, Monte Hermoso Formation, Montehermosan (5.0 - 3.8 Ma)
• The overbank deposits display a wide lateral extension in the
•abrasion platform and the lower part of the cliff; and include the Fl
•and Fm facies. These levels are equivalent to the “Hermosense
•típico” of Vignati (1925) and Bonaparte (1960), the “Unidad A” of
•Fidalgo et al. (1975), and “Unidad Litoestratigráfica I” of Fidalgo and
•Tonni (1982)
Environment/lithology: fluvial; brown, red breccia
•colors between dark brown and reddish brown. They are composed
•of silty and sandy intraclasts, some of them rounded, without selection
•and chaotically distributed in a muddy matrix. These
•deposits overlie the Fl facies at an erosion surface, generally show a
•massive structure, although in some cases a fine lamination could
•be barely distinguished
Size classes: macrofossils, mesofossils
Preservation: trace
Collection methods: All the materials are housed in the Museo
•Municipal de Ciencias Naturales “Carlos Darwin” (Punta Alta,
•Buenos Aires), under the acronym MD-FM.
Primary reference: R. L. Tomassini, C. I. Montalvo, C.M. Deschamps and T. Manera. 2013. Biostratigraphy and biochronology of the Monte Hermoso Formation (early Pliocene) at its type locality, Buenos Aires Province, Argentina. Journal of South American Earth Sciences 48:31-42 [C. Jaramillo/M. Vallejo]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 152084: authorized by Carlos Jaramillo, entered by Maria Vallejo on 06.11.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Amphibia | |
Ceratophrys ameghinorum South American horned frog | |
Rhinella cf. pisanoi toad | |
Reptilia | |
Tupinambis sp. Daudin 1802 tegu | |
Chelonoidis cf. australis Moreno 1889 turtle | |
Mammalia | |
Mammalia indet. mammal | |
Glyptodontidae indet. Burmeister 1879 glyptodon
Plohophorus figuratus Ameghino 1887 glyptodon | |
Doellotatus inornatus Rovereto 1914 armadillo | |
Pseudotypotherium sp. Ameghino 1904 notoungulate | |
Paedotherium sp. Burmeister 1888 notoungulate
Paedotherium typicum Ameghino 1887 notoungulate
Paedotherium bonaerense Ameghino 1887 notoungulate
Tremacyllus impressus Ameghino 1888 notoungulate | |
Macraucheniidae indet. Ameghino 1889 placental | |
Rodentia indet. rodent | |
Paramyocastor diligens Ameghino 1888 caviomorph | |
Actenomys priscus Owen 1840 caviomorph | |
Palaeocavia sp. Ameghino 1889 caviomorph | |
Phugatherium cataclisticum Ameghino 1887 caviomorph |