The Kalkowsky Project – Chapter V. Asymmetric ooids from the Yacoraite Formation (Argentina)

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DOI:

https://doi.org/10.2110/carnets.2024.2403

Keywords:

ooid, microbial carbonates, Salta, Argentina, Maastrichtian-Danian

Abstract

Asymmetric ooids are documented in a brackish Maastrichtian to Danian paleolake in NW Argentina. Their distinctive asymmetric growth pattern is likely related to an uneven distribution of the Extracellular Polymeric Substances (EPS) around the coated allochem, within which calcite fibers (i.e., 'fibrite') have grown. This pattern is unlikely to be mistaken for that of other 'eccentric' ooids, such as wobbly ooids, spiny ooids, hiatus ooids, half-moon ooids, 'broken' ooids sensu lato, or collapsed oomolds (referred to as 'distorted' ooids).

CG2403

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Published

2024-01-20

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Articles

How to Cite

The Kalkowsky Project – Chapter V. Asymmetric ooids from the Yacoraite Formation (Argentina). (2024). Carnets Geol., 24, 75-82. https://doi.org/10.2110/carnets.2024.2403