- Source: Malhada Vermelha Formation
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:
Fish
cf. Lepitodes sp.
Hybodontidae indet.
Planohybodus marki
Reptiles
Crocodylomorpha indet.
Ichnofossils
Taenidium barretti
Carnosauria indet.
See also
Crato Formation
Romualdo Formation
Missão Velha Formation
References
= Bibliography
=Paula Moreira, João Victor; Sales Paula, Francisco Danilo; Sales Viana, Maria Somália; de Paulo Chaves, Arquimedes Pompeu; Quezado de Figueiredo, Ana Emilia (2018), "Taenidium barretti Bradshaw, 1981 na Formação Malhada Vermelha (Cretáceo Inferior), Bacia de Malhada Vermelha, Ceará, Brasil - Taenidium barretti Bradshaw, 1981 in the Malhada Vermelha Formation (Lower Cretaceous), Malhada Vermelha Basin, Ceará, Brazil", Anuário do Instituto de Geociências - UFRJ, 41: 104–112, retrieved 2020-06-18
Pinheiro, F.; de Figueiredo, A. E. Q.; Dentzien-Dias, P. C.; Fortier, D. C.; Schultz, C. I.; Viana, M. S. S. (2013), "Planohybodus marki sp. nov., a new fresh-water hybodontid shark from the Early Cretaceous of northeastern Brazil", Cretaceous Research, 41: 210–216, Bibcode:2013CrRes..41..210P, doi:10.1016/j.cretres.2012.12.005
Leonardi, G (1989), Inventory and statistics of the South American dinosaurian ichnofauna and its paleobiological interpretation, D. D. Gillette & M. G. Lockley (ed.), Dinosaur Tracks and Traces, pp. 165–178
