PBDB Collection

Arroyo Calafate (Cretaceous of Argentina)

Where: Santa Cruz, Argentina (50.4° S, 72.2° W)

• Paleocoordinates: 49.3° S, 62.7° W (Wright 2013)

• coordinate stated in text

When: La Irene Formation, Maastrichtian (72.1 - 66.0 Ma)

Environment/lithology: fluvial-deltaic; lithified, sandy sandstone and lithified, argillaceous, sandy shale

• At the base of Cerro Calafate has measured a column of about 230 m in thickness on the drive here considered (Fig. 2). The 110 m below represent a succession of sandy banks clear yellowish brown color to white and dark pelitic packages fining upwards cycles are stacked to form a sequence with a clear trend growing grain and stratum. Sandy banks (coarse to fine sand) show increasing thickness from 2 m at the base to more than 9 m, whereas intercalated mudstones show an opposite trend with thickness ranging from 15 m at the base to 1 m. At the top of lower shaly packets (the thickest) are preserved carbonaceous shale intervals, thinly laminated. 120 m above correspond to a succession of amalgamated conglomeratic sandy banks where preservation is extremely rare shaly intervals.

Size class: microfossils

Preservation: soft parts, original sporopollenin

Collection methods: chemical, hydrochloric, hydroflouric

• Museum repositories: Provincial Regional Museum "Padre Manuel Jesús Molina" (MPM-MP) in the Río Gallego city, Santa Cruz, Argentina.

Primary reference: L. Povilauskas, V. Barreda, and S. Marenssi. 2008. Polen y esporas de la Formación La Irene (Maastrichtiano), sudoeste de la provincia de Santa Cruz, Argentina: primeros resultados. Geobios 41:819-831 [C. Jaramillo/J. Moreno/J. Moreno]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 149974: authorized by Carlos Jaramillo, entered by Jessica Moreno on 30.08.2013

Creative Commons license: CC0 (CC0)

Taxonomic list

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Dicotyledoneae
Ericales - Ericaceae	Ericipites scabratus Ericipites scabratus Harris 1965 heather
Angiospermae
Chloranthales - Chloranthaceae	Clavatipollenites sp. Clavatipollenites sp. Couper 1958
Proteales - Proteaceae	Proteacidites sp. Proteacidites sp. Cookson and Couper 1953
Proteales -	Peninsulapollis gillii, Retidiporites camachoii Peninsulapollis gillii Dettmann and Jarzen 1988 Retidiporites camachoii Archangelsky 1973
Mesangiosperms - Arecaceae	Arecipites sp., Arecipites minutiscabratus, Longapertites sp., Spinizonocolpites hialinus Arecipites sp. Nichols et al. 1973 palm Arecipites minutiscabratus Mc Intyre 1968 palm Longapertites sp. van Hoeken-Klinkenberg 1964 palm Spinizonocolpites hialinus Archangelsky and Zamaloa 1986 palm
Mesangiosperms - Liliaceae	Liliacidites sp., Liliacidites cf. variegatus Liliacidites sp. Couper 1953 Liliacidites cf. variegatus Couper 1953
Magnoliopsida
-	Psilatricolporites sp., Senipites sp., Rhoipites sp., Rhoipites minusculus, Rousea patagonica Psilatricolporites sp. Pierce 1961 Senipites sp. Srivastava 1969 Rhoipites sp. Wodehouse 1933 Rhoipites minusculus Archangelsky 1973 Rousea patagonica Archangelsky 1973

Coniferales - Podocarpaceae	Microcachryidites antarcticus, Trisaccites microsaccatum, Gamerroites psilasaccus, Podocarpidites cf. ellipticus, Podocarpidites elegans, Phyllocladidites mawsonii Microcachryidites antarcticus Couper 1953 podocarp Trisaccites microsaccatum Couper 1953 podocarp Gamerroites psilasaccus Archangelsky 1988 podocarp Podocarpidites cf. ellipticus Cookson 1947 podocarp Podocarpidites elegans Romero 1977 podocarp Phyllocladidites mawsonii Cookson 1947 podocarp
Nyssapollenites
-	Nyssapollenites cf. squamosus Nyssapollenites cf. squamosus Dettmann 1973
Polypodiopsida
- Gleicheniaceae	Gleicheniidites senonicus Gleicheniidites senonicus Ross 1949
Schizaeales - Polypodiidae	Cicatricosisporites australiensis Cicatricosisporites australiensis Potonié 1956
-	Verrucosisporites sp. Verrucosisporites sp. Potonie and Kremp 1954
- Osmundaceae	Baculatisporites sp., Baculatisporites comaumensis Baculatisporites sp. Thomson and Pflug 1953 Baculatisporites comaumensis Potonie 1953
- Polypodiaceae	Laevigatosporites ovatus Laevigatosporites ovatus Wilson and Webster 1946
Pteridopsida
-	Matonisporites sp., Cyathidites sp., Cyathidites minor, Granulatisporites sp., Ischyosporites volkheimeri Matonisporites sp. Couper 1958 Cyathidites sp. Couper 1953 Cyathidites minor Couper 1953 Granulatisporites sp. Potonié and Kremp 1954 Ischyosporites volkheimeri Filatoff 1975
Lycopodiopsida
Lycopodiales -	Retitriletes austroclavatidites Retitriletes austroclavatidites Döring et al. 1963 clubmoss
Selaginellales -	Ceratosporites equalis Ceratosporites equalis Cookson and Dettmann 1958 clubmoss
Selaginellales - Selaginellaceae	Perotrilites majus Perotrilites majus Evans 1970 spikemoss
Cycadopites
-	Cycadopites nitidus Cycadopites nitidus de Jersey 1964
Ginkgoopsida
Ephedrales -	Equisetosporites sp. Equisetosporites sp. Daugherty 1941
Rouseisporites reticulatus
-	Rouseisporites reticulatus Rouseisporites reticulatus Pocock 1962
Bryopsida
-	Stereisporites antiquasporites Stereisporites antiquasporites Dettmann 1963
Dinophyceae
Gonyaulacales -	Cleistosphaeridium sp. Cleistosphaeridium sp. Davey 1966