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Geobiological and palaeoenvironmental aspects of Corumbella werneri Hahn et al. (1982) and related biota (Ediacaran, Corumbá group)

Grant number: 17/21584-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2018
Status:Discontinued
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal Investigator:Mírian Liza Alves Forancelli Pacheco
Grantee:Gabriel Ladeira Oses
Home Institution: Centro de Ciências Humanas e Biológicas (CCHB). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil
Associated research grant:16/06114-6 - The Neoproterozoic Earth System and the rise of biological complexity, AP.TEM
Associated scholarship(s):19/10929-3 - Testing biomineralisation in Corumbella werneri Hahn et al. (1982) and comparison with Sinotubulites: geobiological perspectives of the earliest MINERALISED skeletal biotas, BE.EP.DR

Abstract

Geological changes, such as tectonic reconfigurations and large glaciations, marked profound changes in the evolution of the biosphere at the Ediacaran/Cambrian boundary (ca. 541 Ma.). Ecological feedback may have contributed to the origin of animals capable of synthesizing hard skeletons or actively exploiting the substrate, which has resulted in biological diversification and radiation. In the Corumbá Group, the Tamengo Formation (MS) consists of siliciclastic and carbonate rocks deposited on a marine platform, where the oldest metazoans of South America are found-including some of the first animals able to build hard skeletons, such as Cloudina sp. and Corumbella werneri. This project aims to investigate the aspects related to the preservation and skeletogenesis of Corumbella, revealing possible geochemical, sedimentary, and geobiological controls linked to fossilization. Besides shedding light on palaeoenvironmental, taphonomic, palaeoecological, and evolutionary issues, the results of this work will compose a database for comparison with taphonomic processes of other Ediacaran geological units (e.g. Namibia, China and Australia). For that, imaging and geochemical techniques, such as SEM/EDS, Raman spectroscopy and x-ray fluorescence will be used. (AU)