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Bajo Grande, Río Chico Department, Santa Cruz Province, Argentina
| Lat/Long (Decimal) | -48.549,-70.128 |
|---|---|
| Co-ordinates Derivation | based on nearby landmark |
| Mindat.org Region (for given coordinates) | Río Chico Department, Santa Cruz Province, Argentina |
Collections
| Collection | Reference | Stratigraphic Name | Comments | Lithology | Age |
|---|---|---|---|---|---|
| Bajo Grande | Archangelsky S. (1967) | Baqueró - Anfiteatro de Ticó | Plant macrofossils collected from two productive horizons in the Bajo Grande paleobotanical collection area. The Anfiteatro de Tico´ Formation was considered by Archangelsky (1967) to be of Early Cretaceous age. A recent isotopic (40Ar/39Ar) dating gave an age of 119.650.45 Ma (Cladera et al., in press; H. Corbella, pers. comm., 2002). (Petrulevicius & Nel, 2003) | "shale" | 125 - 113 Ma Early/Lower Cretaceous |
| Bajo Grande, NF I Araucarites | Petrulevicius J. F., Nel A. (2003) | Baqueró - Anfiteatro de Ticó | Our specimen comes from the oldest of formation (Anfiteatro de Ticó), which is composed of siliciclastic and volcanoclastic deposits (Cladera et al., in press). At the top of the sequence there are two fossiliferous levels of dark grey shales and mudstones developed at the locality of Bajo Grande (Archangelsky, 1967)...According to Archangelsky (pers. comm., 2002), the specimen comes from the lower of the two levels (NF I, Araucarites of Archangelsky, 1967). | "shale" | 125 - 113 Ma Early/Lower Cretaceous |
Recorded Fossils
| Accepted Name | Hierarchy | Age |
|---|---|---|
 Sphenopteris sp.genus | Plantae : Tracheophyta : Lyginopteridaceae : Sphenopteris | 125 - 113 Ma Early/Lower Cretaceous |
 Blattulopsis popovispecies | Animalia : Arthropoda : Insecta : Blattodea : Mesoblattinidae : Blattulopsis : Blattulopsis popovi | 125 - 113 Ma Early/Lower Cretaceous |
 Argentinopetala archangelskyispecies | Animalia : Arthropoda : Insecta : Odonata : Petaluridae : Argentinopetala : Argentinopetala archangelskyi | 125 - 113 Ma Early/Lower Cretaceous |
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
