CIG   05423
CENTRO DE INVESTIGACIONES GEOLOGICAS
Unidad Ejecutora - UE
capítulos de libros
Título:
Biostratigraphy. Neoproterozoic-Cambrian evolution of the Río de la Plata Palaeocontinent
Autor/es:
GAUCHER, CLAUDIO; POIRÉ, DANIEL G.
Libro:
Neoproterozoic-Cambrian tectonics, global change and evolution: a focus on southwestern Gondwana
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2008; p. 1 - 43
Resumen:
Neoproterozoic stromatolites were first recognised in the Río de la Plata Craton (RPC)
by González Bonorino (1954) in the Sierras Bayas Group (Argentina). The first body
fossils were also described from this unit by Fairchild (1978) and Pothe de Baldis et al.
(1983), consisting of organic-walled microfossils (acritarchs). In Uruguay, Montaña and
Sprechmann (1993) were the first to recognise Cambrian stromatolites in the Cerro
Victoria Formation. The first report of Neoproterozoic body fossils (acritarchs) in
Uruguay is due to Gaucher and Schipilov (1994) and Gaucher et al. (1996). Since these
first reports, around a dozen papers appeared that deal with Neoproterozoic and
Cambrian fossils in the RPC. The sedimentary successions deposited on and around the
RPC record the existence of a diversified biota in Ediacaran times, including
cyanobacteria, acritarchs, shelly fossils, stromatolites, trace fossils and possibly- rare
members of the Ediacara fauna.