PBDB Collection

Palo Seco creek (Cretaceous of Argentina)

Where: Salta, Argentina (25.4° S, 65.8° W: paleocoordinates 28.7° S, 48.2° W)

• coordinate estimated from map

When: Morales Member (Las Curtiembres Formation), Campanian (83.6 - 72.1 Ma)

• The Palo Seco creek is an affluent of the Las Conchas creek.

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified, argillaceous shale and lithified, muddy limestone

• The overlying Las Curtiembres Formation is composed of fine-grained sediments widely distributed in the basin. During the rift climax, the Las Conchas Basalt was formed by pyroclastic and lava flows. Green siltstones, whitish sandstones and micritic limestones of the lacustrine Morales Member accumulated in volcanic event. The Morales Member, which belongs to the middle section of the Las Curtiembres Formation, is known for its fossil pipid frogs that appear together with badly preserved plant remains and clupeiform fish. During the late synrift, the coarse-grained sandstones and conglomerates of the Los Blanquitos Formation were deposited.

Size class: microfossils

Preservation: soft parts, original sporopollenin

Collection methods: chemical, hydrochloric, hydroflouric

• The palynologic slides are stored at the Paleopalynology Collection of the Department of Geology and Paleontology at IANIGLA as numbers of catalogue: 8361 to 8364 MPLP (Mendoza-Paleopalinoteca-Laboratorio- Paleopalinología).

Primary reference: P. L. Narváez and I. F. Sabino. 2008. Palynology of the Las Curtiembres Formation (Late Cretaceous, Salta Group Basin), Las Conchas Creek area, northwestern Argentina. Ameghiniana 45(2):473-482 [C. Jaramillo/J. Moreno]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 149979: authorized by Carlos Jaramillo, entered by Jessica Moreno on 30.08.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Gymnospermopsida
-	Singhia sp. Singhia sp. Srivastava 1967
Equisetopsida
Pinidae - Pinidae	Classopollis sp. Classopollis sp. Pflug 1953
Angiospermae
Gunnerales -	Tricolpites sp. Tricolpites sp. Couper 1953
Proteales - Proteaceae	Triporopollenites sp. Triporopollenites sp. Pflug and Thomson 1953
Proteales -	Peninsulapollis gillii Peninsulapollis gillii Dettmann and Jarzen 1988
Mesangiosperms - Liliaceae	Liliacidites vermireticulatus Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Magnoliopsida
-	Rhoipites sp., Striatricolporites sp., Rousea patagonica Rhoipites sp. Wodehouse 1933 Striatricolporites sp. Leidelmeyer 1966 Rousea patagonica Archangelsky 1973
Gnetaceaepollenites
-	Gnetaceaepollenites sp. Gnetaceaepollenites sp. Thiergart 1938
Pteridopsida
-	Deltoidospora minor Deltoidospora minor Pocock 1970
Polypodiopsida
- Osmundaceae	Baculatisporites sp. Baculatisporites sp. Thomson and Pflug 1953
Ginkgoopsida
Ephedrales -	Ephedripites "sp. 1", Ephedripites "sp. 2", Ephedripites multicostatus, Ephedripites caichiguensis Ephedripites "sp. 1" Bolkhovitina and Potonié 1958 Ephedripites "sp. 2" Bolkhovitina and Potonié 1958 Ephedripites multicostatus Brenner 1963 Ephedripites caichiguensis Narváez and Sabino 2008 (Volkheimer and Quattrocchio 1975a) nov. comb. (Narvaez and Sabino 2008)