Coimbra Group (geology)

Coimbra Group
Stratigraphic range: Sinemurian-Pliensbachian
S. Pedro de Muel Beach, main Coimbra Formation outcrop
Praia de Água de Madeiros, main outcrop of the formation
TypeGeological formation
Sub-units
  • Coimbra Formation (Vila Seca Member & Casa do Sal Member)
  • Água de Madeiros Formation (Polvoeira Mb & Praia da Pedra Mb)
Underlies
  • Vale das Fontes Formation
Overlies
  • Dagorda Formation
  • Pereiros Formation
AreaLusitanian Basin
Thickness120-150 m
Lithology
PrimaryLimestones
Location
LocationCoimbra Region
Coordinates39.8° N, 9.0° W
RegionLusitanian Basin
CountryPortugal
Type section
Named forThe Village of Coimbra
Named byDimuccio, Duarte & Cunha
Thickness at type section~120 m (390 ft)
Coimbra Group (geology) (Portugal)

The Coimbra Group (Also known as Camadas de Coimbra or Calcários de S. Miguel) is a geological group of Sinemurian-Pliensbachian (Lower Jurassic) age in the Lusitanian Basin of Portugal. The unit is made of the Coimbra & the Água de Madeiros Fms, that represent a series of peritidal to intertidal facies of a Carbonate platform mostly of Obtusum-Ibex age, that gradually evolve to open marine/hemipelagic units Vale das Fontes Formation and Lemede formation. This unit is known for its fossil content, including Invertertebrate and vertebrate ichnofossils and fossils. The group wasn´t named until 2014.

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