Coordinates: 47°36′S 68°06′W / 47.6°S 68.1°W / -47.6; -68.1

La Matilde Formation

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La Matilde Formation
Stratigraphic range: Bathonian-Kimmeridgian
~167–151 Ma
TypeGeological formation
UnderliesSan Julián Formation
OverliesChon Aike Formation
Lithology
PrimaryClaystone, sandstone, siltstone
OtherCoal beds, conglomerate, tuff
Location
LocationPatagonia
CoordinatesLua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value).
Approximate paleocoordinatesLua error: callParserFunction: function "#coordinates" was not found.
RegionSanta Cruz Province
CountryArgentina
ExtentAustral Basin
La Matilde Formation (Argentina)

La Matilde Formation is a Jurassic geological formation in the Austral Basin of Santa Cruz Province, Patagonia, Argentina. It is dated to the Middle to Late Jurassic. From the Bathonian 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 subtropical and 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

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La Matilde consists primarily of sedimentary rocks. It includes claystone, 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

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La Matilde is known for the abundant fossils recovered from it. Notable 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 taxa recovered from the La Matilde Formation include:[9][10]

Flora
Ichnofossils

See also

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References

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  1. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  2. ^ Channing et al., 2007
  3. ^ Clarke et al., 2011
  4. ^ Sequiera & Farrell, 2001
  5. ^ Iglesias et al., 2011
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  12. ^ Leonardi, 1994, p.27
  13. ^ a b Leonardi, 1994, p.26
  14. ^ Leonardi, 1994, p.25

Bibliography

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Further reading

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