Aeolian dunes morphodynamics and wind regime reconstruction in mid-latitudes of the Gondwana during Early Permian, Aracaré Formation, Sergipe-Alagoas Basin, Brazil

Jones, Fábio Herbert; Scherer, Claiton Marlon dos Santos; Kifumbi, Carrel

doi:10.1016/j.aeolia.2021.100672

Cited by 5 publications

(1 citation statement)

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“…The truncated downwind dipping bounding surfaces in these sets are interpreted as a reactivation surface generated as a consequence of episodic partial erosion of the lee slope of the bedforms, associated with changes in prevailing wind direction and/or strength (Brookfield 1977; Rubin & Hunter 1983; Fryberger 1993; Jones et al . 2021). The sub‐horizontal erosive surfaces separating sets are defined as interdune surfaces resulting from migration and the climbing of dunes and interdune areas (Kocurek 1996; Mountney 2006).…”

Section: Resultsmentioning

confidence: 99%

Burrows provided shelter for tetrapods in a Permo‐Triassic desert

Francischini

Dentzien‐Dias

Battista

et al. 2023

Papers in Palaeontology

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We describe for the first time the presence of straight, curved and quasi‐helical burrows preserved in plan, oblique and transversal views in the aeolian strata of the Permo‐Triassic Buena Vista Formation (Paraná Basin), Rio Grande do Sul, southern Brazil. The morphology of the burrows is similar to that of others found in Guadalupian to Early Triassic‐aged deposits in several parts of the world. Of these, middle Permian dicynodont‐bearing helical burrows (Daimonelix) and Early–Middle Triassic kidney‐shaped burrows (Reniformichnus), both from the Karoo Basin of South Africa, show a remarkable similarity to the Brazilian burrows, prompting a discussion of the probable producers. Dicynodonts, cynodonts, therocephalian and/or procolophonians are among the probable producers of such burrows, based on size compatibility between the burrows and estimates of body size for the fossil taxa, along with the presence of skeletal adaptations in Permo‐Triassic tetrapods for digging (bone micro‐ and macrostructure). Last, we discuss some behavioural aspects of the producer of the burrows, mainly due to the presence of passive filling and bilobate bottoms in the tunnels, which indicates that they remained open as long as they were occupied. The burrows were excavated in a dry aeolian system that occurred in the Guadalupian–Induan interval of Brazil, representing the oldest unambiguous record of tetrapod dwelling structures in such an environment, and providing new and unprecedented information regarding the colonization of deserts by tetrapods during the end‐Permian biotic crisis.

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