Where: Neuquén, Argentina (41.0° S, 71.2° W: paleocoordinates 43.5° S, 61.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Huitrera Formation, Early/Lower Eocene (55.8 - 48.6 Ma)
• Ar - Ar dating on sanidine and biotite.
•The corresponding microfloras are of Early Eocene age.
• member-level stratigraphic resolution
Environment/lithology: lacustrine deltaic; claystone and siltstone
• Microflora correspond to sediments of the eastern most volcanic arc (of Paleocene to Eocene age) of northwestern extra-andean Patagonia.
• The local strata consist of tuff and mudstone, claystone and siltite interbedded with sandy laters., somewhat more than 8 m thick on a single section line in the center of the outcrop, representing a volcanic lacustrine environment probably located near a lake margin. Most of the macrofossils at the site occur in a blocky, sity mudstone unit of 1 m thickness.
Size class: microfossils
• This fossil site holds macroflora, microflora, insects, and mostly famously, an ontogenic series of pipid frogs.
Preservation: adpression
Collection methods: specimens are in the Museo Palaeontológico (BAR), San Carlos de Bariloche
Primary reference: D. L. Melendi, L. H. Scafati, and W. Volkheimer. 2003. Palynostratigraphy of the Paleogene Huitrera Formation in N-W Patagonia, Argeyesina. Neues Jahrbuch für Geologie und. Paläoyeslogie, Abhandlungen 228:205-273 [C. Jaramillo/C. Jaramillo/O. Alfaro]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 171385: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 09.07.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
unclassified |
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Equisetopsida |
Pinidae - Pinidae |
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Psilatricolpites |
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Magnoliopsida |
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Periporopollenites demarcatus, Striatricolporites gamerroi, Haloragacidites trioratus, Tricolporites cf. adelaidensis, Tricolporites valvatus, " Tricolpites anguloluminosus" = Albertipollenites anguloluminosus, Retitricolporites chubutensis, Favitricolporites australis, Rhoipites sphaerica, Rhoipites baculatus, Rhoipites romeroi, Rhoipites minusculus
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Angiospermae |
Saxifragales - Altingiaceae |
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Proteales - |
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Proteales - Proteaceae |
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Gunnerales - |
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Coniferales - Podocarpaceae |
Dacrycarpites australiensis, Trisaccites microsaccatum, Lygistepollenites florinii, Gamerroites psilasaccus, Phyllocladidites mawsonii, Podocarpidites magnus, Podocarpidites sp., " Podocarpidites microreticuloidatus" = Podocarpidites microreticuloidata, Podocarpidites ellipticus, Podocarpidites rugulosus, Podocarpidites cf. elegans, Podocarpidites marwickii
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Lycopsida |
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Pteridopsida |
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Converrucosisporites |
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Polypodiopsida |
- Polypodiaceae |
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Schizaeales - Polypodiidae |
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- Blechnaceae |
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- Dicksoniaceae |
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Chlorophyceae |
- |
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Dicellaesporites |
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Multicellaesporites |
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Inapertisporites |
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Pluricellaesporites |
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Ascomycota - Microthyriaceae |
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Plicatopollis |
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Tetraedron |
- Chlorococcaceae |
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