|Name: Santana Formation
Age: Lower Cretaceous, 108-92Ma
The Santana Formation is one of the series of lithologies making up the complex stratigraphy of the fault-bounded interior 'Araripe Basin'.
The diagram below (after Martill, 1993), illustrates the most widely accepted view of the basin's stratigraphy.
The Santana Formation was deposited during the Early Cretaceous, more specifically during the late Aptian to perhaps Cenomanian (108-92 million years ago; Martill, 1990).
During this time, the supercontinent of Gondwana was breaking up, and South America was rifting from Africa. The palaeoenvironment would therefore have been changeable, as indicated by a highly variable sequence of sediments.
Different interpretations have been proposed in previous years, regarding the stratigraphic sequence of the Araripe Basin; these web-pages incorporate Martill's (1993) nomenclature, but some of the specimens used as illustrations in the Fossil Flora and Fauna pages are from the 'Crato Member'. In Martill's (1993) new nomenclature, this member has been elevated to Formation level ('Crato Formation', and as such should not really be included in this review of 'Santana Formation Fossils'. However it seems a pity to exclude such marvellous images, so they are, in fact included!
Return to Santana Formation Fossils index page
Section author: Sally Haseman
Last updated: 20/11/02