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Could acidity be the reason behind the Early Triassic biotic crisis on land?



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Borruel-Abadía, Violeta and Fernández Barrenechea, José María and Galán-Abellán, Belén and Horra del Barco, Raúl de la and López Gómez, José and Ronchi, Ausonio and Luque del Villar, Francisco Javier and Alonso Azcárate, Jacinto and Marzo Carpio, Mariano (2019) Could acidity be the reason behind the Early Triassic biotic crisis on land? Chemical Geology, 515 . pp. 77-86. ISSN 0009-2541

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Official URL: https://www.sciencedirect.com/science/article/pii/S0009254119301597?via%3Dihub


In recent years there is growing evidence of the importance of the Smithian-Spathian (Early Triassic) ecological crisis to explain the delayed recovery of life after the Permian-Triassic Boundary mass extinction. This study focuses on sedimentary continental rocks of middle Permian to Middle Triassic age from four different Peritethys basins in subequatorial latitudes. Similar distribution patterns of aluminum phosphate-sulfate (APS) minerals contents in these rocks in the four studied basins provide evidence of increased acidity during the Smithian-Spathian transition, coinciding with a lack of indicators of organic activity in the same interval. Thus, this period of high acidity on land, may have been one of the causes of this biological crisis. Based on the quantification of APS minerals in the studied sedimentary sequences, we propose that it was not until acidity in the environment diminished, that biotic recovery was possible. APS data may also be useful to interpret other past biotic crises.

Item Type:Article
Uncontrolled Keywords:Acidity, Smithian-Spathian, Crisis, Early Triassic, Aluminum phosphate sulphate minerals, Continental environment
Subjects:Sciences > Geology > Stratigraphic geology
Sciences > Geology > Geochemistry
Sciences > Geology > Paleontology
ID Code:55299
Deposited On:14 May 2019 17:55
Last Modified:16 May 2019 09:52

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