Where: Chubut, Argentina (42.7° S, 69.8° W: paleocoordinates 45.1° S, 58.8° W)
• coordinate estimated from map
When: Lefipán Formation, Danian (66.0 - 61.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: delta front; lithified mudstone
• During the early Danian coarsening-upward cycles reflect accumulation in tidal bars, mainly in a tide to waveinfluenced distal delta-front environment with high sedimentation rates. These deposits bear molluscan faunal associations indicative of recurrent changes from normal marine to low-salinity marine environments with low-oxygen, fine-grained, soupy substrates.
• This bed: Bioturbation - Heterolithic bedding
•The Lefipán Formation consists of marine to marginal marine, fossiliferous sandstones and mudstones with some intercalated coquinas and conglomerates.
Size class: microfossils
• Samples were marine (dinoflagellate cysts)and continental (spores, pollen grains, fungal remains, fresh water algae) palynomorphs.
Preservation: original sporopollenin
Collection methods: chemical,
• Slides are housed in the palynological collection of the Museo Paleontológico Egidio Feruglio, Trelew, Chubut, Argentina (MPEF-Palin)numbers 100 to 113.
Primary reference: V. D. Barreda, N. R. Cúneo, P. Wilf, E. D. Currano, R. A. Scasso and H. Brinkhuis. 2012. Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in Diversity, Low Extinction, and a Classopollis Spike. PLoS ONE 7(12):e52455 [C. Jaramillo/J. Moreno]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 151457: authorized by Carlos Jaramillo, entered by Jessica Moreno on 03.10.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
• Pollen terminology follows Punt et al. 2007.
Show authors, comments, and common names
Psilatricolpites |
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Equisetopsida |
Pinidae - Pinidae |
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Dicotyledoneae |
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Angiospermae |
Malvales - Bombacaceae |
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Fabales - Fabaceae |
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Fagales - |
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Gunnerales - |
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Proteales - |
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Proteales - Proteaceae |
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Aquifoliales - Aquifoliaceae |
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Buxales - |
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Poales - Typhaceae |
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Mesangiosperms - Liliaceae |
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Mesangiosperms - Arecaceae |
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Chloranthales - Chloranthaceae |
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Magnoliopsida |
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Gemmatricolpites "sp. 1", Haloragacidites harrisii, Senipites tercrassata, Psilatricolporites "sp. 1", Psilatricolporites salamanquensis, Rousea microreticulata, Rousea patagonica, Rhoipites minusculus, Retitricolporites "sp. 1", Retitricolporites cf. minutiformis, Retitricolporites chubutensis, Striatricolporites gamerroi
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Coniferales - Podocarpaceae |
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Lycopodiopsida |
Isoetales - Isoetaceae |
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Selaginellales - Selaginellaceae |
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Selaginellales - |
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Bryopsida |
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Polypodiopsida |
- Dicksoniaceae |
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- Polypodiaceae |
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- Blechnaceae |
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- Gleicheniaceae |
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Pteridopsida |
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Lycopsida |
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