Perfil de Rebasa (1982), Muestra#102 (Cretaceous to of Argentina)

Where: Santa Cruz, Argentina (49.2° S, 72.1° W: paleocoordinates 51.4° S, 39.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Kachaike Formation, Late/Upper Aptian to Late/Upper Aptian (122.5 - 109.0 Ma)

• Reported as "una antiguedad Cretacico inferior (Aptiano-Albiano) o mas precisamente Aptiano superior-Albiano inferior (p. 676)" based on pollen and spores and megaspores"

Environment/lithology: shale

• "Las evidencias litologicas y paleontologicas han manifestado un ambiente continental, la presencia de restos algales como Dictythylakos y Botryococcus acompanadas de megasporas con fuertes engrosamientos ecuatoriales y apendices diversos, la abundancia de granos de polen y esporas y grandes restos to cuticula indicarian posibles cuerpos de agua de poca profundidad con 'dos breves episodios marinos' debido (Gamerro 1982), a la escasa presencia de dinoflagelados en dos de las muestras estudiadas (p. 675)."?Continental environment with occasional shallow bodies of water and two marine incursions. However, she mentions dinoflagellates in two studied samples but does not say which so environment is uncertain.
• "fangolita" probably translated loosely as mudstone [fango = mud], but entered as "shale" to be conservative

Size class: microfossils

Preservation: original sporopollenin

Collection methods: surface (in situ), chemical, sieve,

Primary reference: A. M. Baldoni. 1987. Dos nuevas especies de megasporas de la Formacion Kachaike, Cretacico Inferior de Santa Cruz, Argentina. Anais do X Congreso Brasileiro de Paleontologia, Sociedade Brasileira de Paleontologia 2:669-689 [R. Lupia/R. Lupia/R. Lupia]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32202: authorized by Rick Lupia, entered by Rick Lupia on 10.06.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• Information given about other genera, and some species, present in samples, but not for each sample individually (see Collection# 32199)
Show authors, comments, and common names
Pteridopsida
 Marsileales -
Arcellites santacrucensis