Puesto El Moro Creek - Kachaike Formation (Cretaceous to of Argentina)

Where: Santa Cruz, Argentina (49.1° S, 72.1° W: paleocoordinates 50.9° S, 39.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Kachaike Formation, Aptian to Aptian (125.0 - 109.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: delta plain; lithified, black, argillaceous shale and lithified, sandy sandstone

• The Kachaike Formation (Riccardi, 1971) is composed of transgressive sequences deposited in a deltaic environment that becomes progressively continental, with fine pyroclastic elements probably derived from the Divisadero Group.
• In the area studied this unit begins with dark laminated shales, sporadically interrupted by cross-bedded fine sandstones interpreted as distal platform

•deposits. In the middle levels, sandstone becomes more abundant (in both grain size and thickness), and four sedimentary cycles are recognized, each composed of dark laminated shales representing deep facies, and fine sandstones representing shoreface facies.

Size class: microfossils

• Other: Palynomorphs

Preservation: soft parts, original sporopollenin

Reposited in the MACN

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

Primary reference: V. Perez Loinaze, S. Archangelsky, and G. Cladera. 2011. Palynostratigraphic study of the Early Cretaceous Río Mayer and Kachaike formations at the Quebrada El Moro Section, Austral Basin, southwestern Argentina. Cretaceous Research (34)161-171 [C. Jaramillo/P. Santamarina/P. Santamarina]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 149850: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 28.08.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Botryococcus "sp." Kutzing 1849
 Alismatales - Alismatidae
Pennipollis peroreticulatus Friis et al. 2000
Asteropollis asteroides
Asteropollis asteroides Hedlund and Norris 1968
 Pinales - Podocarpaceae
Podocarpidites cf. parviauriculatus Archangelsky and Villar de Seoane 2005
Gamerroites volkheimeri Archangelsky 1988
Gamerroites cf. psilasaccus Archangelsky 1988
 Pinales - Araucariaceae
Cyclusphaera "sp." Elsik 1966
Cyclusphaera radiata Archangelsky 1983
Cyclusphaera psilata Volkheimer and Sepulveda 1976
 Pinales - Cheirolepidiaceae
Classopollis "sp." Pflug 1953
 Pinales -
Muricingulisporis cf. annulatus Archangelsky and Gamerro 1966
Cyathidites minor Couper 1953
Cyathidites australis Couper 1953
 Schizaeales -
Ruffordiaspora ludbrookiae Dettmann and Clifford 1992
Ruffordiaspora australiensis Dettmann and Clifford 1992
Nodosisporites macrobaculatus Archangelsky and Llorens 2005
 Schizaeales - Schizaeaceae
 Gleicheniales - Gleicheniaceae
Clavifera "sp." Bolchovitina 1966
Gleicheniidites serratus Archangelsky and Llorens 2005
 Cyatheales -
Cyatheacidites tectifera Archangelsky and Gamerro 1965
Cingulatisporites "sp." Thomson et al. 1953
Baculatisporites kachaikensis Archangelsky and Llorens 2005
 Lycopodiales -
Dictyotosporites complex Cookson and Dettmann 1958
  - Selaginellaceae
Densoisporites velatus Dettmann 1963
Densoisporites corrugatus Archangelsky and Gamerro 1965
Ceratosporites equalis Cookson and Dettmann 1958
  - Lycopodiaceae
Retitriletes austroclavatidites Döring et al. 1963
Taurocusporites segmentatus
Staplinisporites caminus
 Sphaerocarpales -
Aequitriradites superspinulosus Archangelsky et al. 2008
Aequitriradites verrucosus Cookson and Dettmann 1961
Interulobites (cf. Interulobites) sp. Phillips 1971
cf. Interulobites sp. Archangelsky 1983
Interulobites "sp." Phillips 1971
 Magnoliales - Chloranthaceae
Tricolpites "sp." Potonié 1960
 Gymnospermophyta -
Alisporites similis Dettmann 1963