Paleomagnetism of the Ediacaran Avellaneda Formation (Argentina), Part II: Magnetic and chemical stratigraphy constraints on the onset of the Shuram carbon excursion
- Afonso, J. W. L.
- Franceschinis, Pablo Reinaldo
- Rapalini, Augusto Ernesto
- Arrouy, Maria Julia
- Gómez Peral, Lucia
- Poiré, Daniel G.
- Caetano Filho, S.
- Trindade, R. I. F.
DOIAbstract
Magnetostratigraphy is a powerful technique for high-resolution stratigraphic correlation and accurate dating of the polarity history of the magnetic field. Up to now, magnetostratigraphic studies have been underutilized in Ediacaran successions. Here, we present a magnetostratigraphy coupled with a carbon isotope study in Ediacaran Avellaneda Formation (∼570 Ma), a sedimentary cover sequence in the Tandilia orogenic belt, of the Río de la Plata craton. Paleomagnetic results and δ13C profiles were obtained from three drill cores that cut across the sedimentary record of the Avellaneda Formation. Paleomagnetic results plotted stratigraphically allowed the identification of a prevalent reverse polarity separated by normal polarity interval. O...
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