Latest Triassic Active Aeolian Dune Field Preserved by CAMP ‐Related Lava Flows

Fieldwork investigations and stratigraphic analyses in the Parnaíba Basin, northern Brazil, reveal the interaction of the uppermost part of the Triassic Sambaíba aeolian dune field (erg) system with the latest Triassic–earliest Jurassic Mosquito lava flows. The lava flows originated as part of the C...

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Bibliographic Details
Published in:	Terra nova (Oxford, England)
Main Authors:	Michel, Rossano D. L., Scherer, Claiton M. S., dos Reis, Adriano D., Kifumbi, Carrel, Cechetti, Ronaldo P., Jones, Fábio H.
Format:	Journal Article
Language:	English
Published:	22-10-2024
Online Access:	Get full text
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Summary:	Fieldwork investigations and stratigraphic analyses in the Parnaíba Basin, northern Brazil, reveal the interaction of the uppermost part of the Triassic Sambaíba aeolian dune field (erg) system with the latest Triassic–earliest Jurassic Mosquito lava flows. The lava flows originated as part of the Central Atlantic Magmatic Province (CAMP, ~201 Ma) and covered the aeolian system, allowing almost complete preservation of large‐scale in situ aeolian bedforms, even preserving lee‐ and stoss‐side. During the emplacement, the lava flows interacted with unconsolidated aeolian sediment, generating sediment–lava deformation features that are preserved at the interface between these units. This occurrence attests to arid conditions in the low latitudes of Gondwana at the Triassic–Jurassic transition.
ISSN:	0954-4879 1365-3121
DOI:	10.1111/ter.12754