Misplaced Pages

Malhada Vermelha Formation

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Geological formation in northeastern Brazil
Malhada Vermelha Formation
Stratigraphic range: Valanginian-Hauterivian
~138–130 Ma PreꞒ O S D C P T J K Pg N
TypeGeological formation
Unit ofIguatu Group
UnderliesLima Campos Formation
OverliesQuixoá Formation
Thickness500–800 m (1,600–2,600 ft)
Lithology
PrimarySandstone
OtherSiltstone
Location
Coordinates6°18′S 39°06′W / 6.3°S 39.1°W / -6.3; -39.1
Approximate paleocoordinates4°30′S 6°12′W / 4.5°S 6.2°W / -4.5; -6.2
RegionCeará
Country Brazil
ExtentLima Campos & Malhada Vermelha Basins
Malhada Vermelha Formation is located in BrazilMalhada Vermelha FormationMalhada Vermelha Formation (Brazil)

The Malhada Vermelha Formation is an Early Cretaceous (Valanginian to Hauterivian) geologic formation in Ceará, northeastern Brazil. The formation preserves reptile, fish and ichnofossils.

Description

The formation is characterized by a cyclic sequence of siltstones that are intercalated with fine to medium sandstones with the presence of festoon cross-stratification and climbing ripples, deposited in an alluvial environment in a hot semiarid paleoclimate.

The formation crops out in two minibasins, the Lima Campos and eponymous Malhada Vermelha Basins. The 500 to 800 metres (1,600 to 2,600 ft) thick formation overlies the Quixoá Formation and is overlain by the Lima Campos Formation.

Fossil content

The following fossils were reported from the formation:

See also

References

  1. ^ Malhada Vermelha Formation at Fossilworks.org
  2. Paula Moreira, 2018, p.106
  3. ^ Pinheiro et al., 2013
  4. Felipe L. Pinheiro; Ana Emilia Q. de Figueiredo; Paula C. Dentzien-Dias; Daniel C. Fortier; Cesar L. Schultz; Maria Somália S. Viana (2013). "Planohybodus marki sp. nov., a new fresh-water hybodontid shark from the Early Cretaceous of northeastern Brazil". Cretaceous Research. 41: 210–216. doi:10.1016/j.cretres.2012.12.005.
  5. Paula Moreira, 2018, p.107
  6. Leonardi, 1989

Bibliography

Categories: