Palaeoecology of Late Triassic marine assemblages from the proto-Atlantic Basin (Ayamonte, SW Spain)

Santos, Ana; Popovic, Nevena; Mayoral, Eduardo

doi:10.1016/j.pgeola.2021.11.002

Cited by 2 publications

(4 citation statements)

References 39 publications

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“…Labyrintichnus terrerensis, Planolites isp.) are indicative of the Scoyenia ichnofacies typical of swamp-like to alluvial plain environments (Santos et al, 2022). These deposits are the continuation (in the eastern side of the Guadiana River) of the Grés de Silves Group, which was described in the Portuguese part of the Algarve Basin and assigned to the Carnian by Palain (1976).…”

Section: Geological Settingmentioning

confidence: 93%

“…The lower part of the Triassic succession (around 15 m thick) is constituted by red siltstones and sandstones with gypsum and some microconglomerate intervals. These deposits were interpreted as related to continental or coastal deposits (Alonso- Chaves et al, 2020;Santos et al, 2022). The trace fossils (Taenidium isp.…”

Section: Geological Settingmentioning

confidence: 99%

“…According to the presence of trace fossils (Thalassinoides isp., Treptichnus pollardi and Hel- minthoidichnites tenuis), fossil macroinvertebrates and sedimentary structures, Santos et al (2022) have interpreted a shallow marginal environment with brackish and low energy conditions.…”

Section: Geological Settingmentioning

confidence: 99%

“…The detrital red beds (silts and sands) of the Silves Group represent the earliest phase of sedimentation related to the initial rifting of Pangaea, dated as early Carnian (Vilas-Boas et al, 2022). The carbonate succession, dated as Rhaetian (Santos et al, 2022), represents the flooding of the Algarve Basin and the colonization by mollusks (bivalves and gastropods) and marine vertebrates such as phytosaurs (Mateus et al, 2014), the placodont Henodus (Campos & Mateus, 2018;Ruciński, 2020) and the here studied sauropterygian of Ayamonte. The presence of dolerite rocks in the succession is congruent with the extensional phase of the rifting.…”

Section: Sedimentary Environmentmentioning

confidence: 99%

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Primer registro de sauropterigios fósiles del Triásico Superior del suroeste de España (Ayamonte, provincia de Huelva)

et al. 2022

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Este trabajo se centra en el estudio del primer registro de un resto fósil de sauropterigio procedente del Triásico superior del sector oriental del Paleomargen Suribérico. El resto, encontrado en la sucesión sedimentaria carbonatada del Triásico que aflora en Ayamonte (Huelva, España), corresponde a un arco neural de un sauropterigio. La sucesión carbonatada se depositó en un ambiente marino muy somero simultáneamente a cierta actividad ígnea durante el Rhaetiense (Triásico superior). El resto fósil aparece aislado, desarticulado y presenta algunas fracturas que evidencian cierto transporte por corrientes, sin descartar la posible interacción de organismos carroñeros. El arco neural está conservado como fosfato cálcico con enriquecimiento en Sr, de acuerdo con los mapeos composicionales realizados sobre el resto fósil y el sedimento circundante. Los rasgos anatómicos no han permitido su identificación taxonómica detallada. El resto estudiado extiende el registro de reptiles sauropterigios hacia el occidente colonizando el Paleomargen Suribérico, en este caso la Cuenca del Algarve, conforme se producía la rotura (rifting) de Pangea y el Tethys se abría paso hacia el oeste con la progresiva inundación de nuevas cuencas.

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Section: Geological Settingmentioning

confidence: 93%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%