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Abstract:

The Playa Hermosa Formation (Fm.) (Playa Verde Basin) is a volcano-sedimentary unit that crops out in the extreme south of the Dom Feliciano Belt in Uruguay. This formation has traditionally been interpreted as non-glacial in origin, but recently it has been suggested that the lower part at least may be glacially influenced. The stratigraphic position of the Playa Hermosa Fm. and its correlation with other Neoproterozoic units of Uruguay, Argentina and southern Brazil remains in dispute. An age of c. 580 Ma is indicated by a hornblende 39Ar/ 40Ar age on magmatism regarded as coeval with syn-sedimentary volcanism. Preliminary palaeomagnetic data suggest a primary remanence and a mean geomagnetic pole consistent with the proposed apparent polar wander path for the Río de La Plata craton. In combination, these data suggest mid-Ediacaran glacial sedimentation in low to intermediate latitudes on the Río de la Plata craton. However, this conclusion needs to be reinforced by more thorough studies of the age and origin of the Playa Hermosa Fm. © The Geological Society of London 2011.

Registro:

Documento: Artículo
Título:Chapter 52 The playa hermosa formation, playa verde basin, Uruguay
Autor:Pazos, P.J.; Rapalini, A.E.; Bettucci, L.S.; Tófalo, O.R.
Filiación:Departamento de Ciencias Geológicas, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
Palabras clave:argon-argon dating; glacial sedimentation; lithostratigraphy; paleomagnetism; Proterozoic; stratigraphic correlation; Brazil; Dom Feliciano Belt; Rio de la Plata; Rio Grande do Sul; Uruguay
Año:2011
Volumen:36
Número:1
Página de inicio:547
Página de fin:553
DOI: http://dx.doi.org/10.1144/M36.52
Título revista:Geological Society Memoir
Título revista abreviado:Geol. Soc. Mem.
ISSN:04354052
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_04354052_v36_n1_p547_Pazos

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Citas:

---------- APA ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S. & Tófalo, O.R. (2011) . Chapter 52 The playa hermosa formation, playa verde basin, Uruguay. Geological Society Memoir, 36(1), 547-553.
http://dx.doi.org/10.1144/M36.52
---------- CHICAGO ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R. "Chapter 52 The playa hermosa formation, playa verde basin, Uruguay" . Geological Society Memoir 36, no. 1 (2011) : 547-553.
http://dx.doi.org/10.1144/M36.52
---------- MLA ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R. "Chapter 52 The playa hermosa formation, playa verde basin, Uruguay" . Geological Society Memoir, vol. 36, no. 1, 2011, pp. 547-553.
http://dx.doi.org/10.1144/M36.52
---------- VANCOUVER ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R. Chapter 52 The playa hermosa formation, playa verde basin, Uruguay. Geol. Soc. Mem. 2011;36(1):547-553.
http://dx.doi.org/10.1144/M36.52