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