La Matilde Formation
| La Matilde Formation | ||
|---|---|---|
Ma | ||
| Type | Approximate paleocoordinates 44°12′S 27°18′W / 44.2°S 27.3°W | |
| Region | Santa Cruz Province | |
| Country | Argentina | |
| Extent | Austral Basin | |
  La Matilde Formation (Argentina) | ||
La Matilde Formation is a
age (164.7 to 167.7 million years ago) to the Kimmeridgian age (150.8 to 155.7 million years ago) at the latest.[1][2][3]
The area was once part of the
temperate regions of the southern supercontinent Gondwana in the Mesozoic era, a more or less continuous landmass consisting of what is now modern South America, Africa, Antarctica, Australia, New Zealand, and New Guinea.[4][5]
Description
La Matilde consists primarily of
coal beds, conglomerates, siltstones, sandstones, and volcanic tuff. La Matilde overlies but sometimes intersperses with the Middle Jurassic Chon Aike Formation.[6] The two formations are the subunits of the Bahía Laura Group.[1]
Fossil content
La Matilde is known for the abundant
fossil localities in the formation include the Cerro Cuadrado Petrified Forest, the Cerro Madre e Hija Petrified Forest, and the remains and trace fossils (including trackways) of dinosaurs in the Laguna Manantiales Farm.[7][8]
Fossil
- Flora
- Agathoxylon matildense
- Araucaria mirabilis
- Araucarites sanctaecrucis
- Brachyphyllum
- Equisetum thermale[11]
- Pararaucaria patagonica
- Ichnofossils
See also
References
- ^ ISSN 0378-102X.
- ^ Channing et al., 2007
- ^ Clarke et al., 2011
- ^ Sequiera & Farrell, 2001
- ^ Iglesias et al., 2011
- ISSN 1851-8249.
- ISBN 978-0-253-35289-7.
- ISBN 978-0-907567-62-2.
- ISBN 978-0-12-373972-8.
- .
- PMID 21613167.
- ^ Leonardi, 1994, p.27
- ^ a b Leonardi, 1994, p.26
- ^ Leonardi, 1994, p.25
Bibliography
- Channing, Alan; Alba B. Zamuner, and Adolfo Zúñiga. 2007. A new Middle–Late Jurassic flora and hot spring chert deposit from the Deseado Massif, Santa Cruz province, Argentina. Geological Magazine 144(2). 401–411. Accessed 2019-03-26.
- Clarke, John T.; Rachel C.M. Warnock, and Philip C.J. Donoghue. 2011. Establishing a time-scale for plant evolution. New Phytologist 192(2011). 266–301. Accessed 2019-03-26.
- Iglesias, Ari; Analia E. Artabe, and Eduardo M. Morel. 2011. The evolution of Patagonian climate and vegetation from the Mesozoic to the present. Biological Journal of the Linnean Society 103(2). 409–422. Accessed 2019-03-26.
- Leonardi, Giuseppe. 1994. Annotated Atlas of South America Tetrapod Footprints (Devonian to Holocene) with an appendix on Mexico and Central America, 1–248. Ministerio de Minas e Energia - Companhia de Pesquisa de Recursos Minerais, Geological Service of Brazil. Accessed 2019-03-25.
- Sequiera, Andrea S., and Brian D. Farrell. 2001. Evolutionary origins of Gondwanan interactions: How old are Araucaria beetle herbivores?. Biological Journal of the Linnean Society 74(4). 459–474. Accessed 2019-03-26.
- ISBN 0-520-24209-2