Marília Formation, Geological formation in Goiás, Brazil
The Marília Formation is a geological sequence in southern Goiás composed of alternating layers of sandstone, siltstone, and mudstone that reveal ancient river channels and floodplains. The sediments display clear patterns showing how water and deposits shaped the landscape millions of years ago.
This formation dates from the Late Cretaceous around 70 to 66 million years ago when fluvial systems dominated southern Brazil's landscape. The layers preserve a record of these ancient waterways and show the conditions under which sediments accumulated.
Scientists and researchers from Brazil conduct regular field studies at the formation to document discoveries and analyze sedimentary patterns within the rocks.
Access to the outcrops requires permits from local authorities and preparation for unpaved terrain in remote areas. Nearby towns can provide information about local guides and necessary equipment.
This formation is divided into three distinct sections, each displaying different soil compositions and clues about contrasting past environmental conditions. This subdivision allows visitors to observe how conditions changed over time.
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