Glacial events in Carboniferous sequences from Paganzo and Río Blanco basins (northwest Argentina): Palynology and depositional setting

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The age and depositional setting of two glacial events recognized in the western basins of Argentina are discussed in this paper. The older one corresponds to diamictites identified in the upper member of the Cortaderas Formation (Visean, Río Blanco Basin). The glacial sequence consists of shales, d...

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Autor principal: Perez Loinaze, V.S
Otros Autores: Césari, S.N, Limarino, C.O
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2010
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100 1 |a Perez Loinaze, V.S. 
245 1 0 |a Glacial events in Carboniferous sequences from Paganzo and Río Blanco basins (northwest Argentina): Palynology and depositional setting 
260 |c 2010 
270 1 0 |m Perez Loinaze, V. S.; Museo Argentino de Ciencias Naturales B. Rivadavia, Conicet Av. Ángel Gallardo 470, 1405 Buenos Aires, Argentina; email: loinazev@macn.gov.ar 
506 |2 openaire  |e Política editorial 
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504 |a de Souza, P.A., Late Carboniferous palynostratigraphy of the Itararé Subgroup, northeastern Paraná Basin, Brazil (2006) Review of Palaeobotany and Palynology, 138, pp. 1-29 
504 |a De Souza, P.A., De Lima, M.R., Saad, A.R., Palinología dos carvôes paleozicos de Estado do Sâo Paulo, Brasil. I-O Carvâode Buri (1993) Revista Do Instituto Geológico, 14, pp. 5-20 
504 |a De Souza, P.A., Saad, A.R., De Lima, M.R., Palinologia dos carvões paleozóicos de Estado do São Paulo, Brasil. IIO Carvão de Monte Mor (1997) Revista Do Instituto Geológico, 18, pp. 7-21 
504 |a De Souza, P.A., Petri, S., Dino, R., Late Carboniferous Palynology from the Itararé Subgroup (Paraná Basin), at Araçoiaba da Serra, São Paulo State, Brazil (2003) Palynology, 27, pp. 39-74 
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520 3 |a The age and depositional setting of two glacial events recognized in the western basins of Argentina are discussed in this paper. The older one corresponds to diamictites identified in the upper member of the Cortaderas Formation (Visean, Río Blanco Basin). The glacial sequence consists of shales, dropstone-bearing shales massive matrixrich diamictites, massive clast-rich diamictites, and stratified diamictites, all of them interpreted as deposited in distal glaciomarine settings. Palynological remains recovered from shales interstratified with diamictites were referred to the late Visean Reticulatisporites magnidictyus-Verrucosisporites quasigobbettii Biozone. Younger glacial deposits were studied at the base of the Guandacol Formation (Paganzo Basin) where are made up by clast-poor massive diamictites, clast-rich massive diamictites, stratified diamictites, thinly-bedded dropstonebearing diamictites, rhythmites, dropstone-bearing shales, and barren of dropstone shales. The whole sequence is interpreted as deposited in low-relief proximal glaciomarine environments (morainal banks). The abundant palynological assemblages found in the glacial interval were included in the subzone A of the Raistrickia densa-Convolutispora muriornata Biozone which is considered Serpukhovian-early Bashkirian in age. Palynological remains found in the Cortaderas Formation suggest that the beginning of the Glacial 2 event in Gondwana (according to Isbell's chronological proposal for glacial and interglacial stages) should be considered late Visean while the end, according to the assemblages recovered from the Guandacol Formation, was not younger than early Bashkirian. Moreover, sedimentological and stratigraphic data suggest the existence of a short interglacial period between the Cortaderas and Guandacol glacial events.  |l eng 
593 |a Museo Argentino de Ciencias Naturales B. Rivadavia, Conicet Av. Ángel Gallardo 470, 1405 Buenos Aires, Argentina 
593 |a Departamento de Geología, Universidad de Buenos Aires-Conicet, Pabellón 2, Ciudad Universitaria, (1428) Buenos Aires, Argentina 
651 4 |a ARGENTINA 
651 4 |a ARGENTINA 
690 1 0 |a CARBONIFEROUS 
690 1 0 |a GLACIATION 
690 1 0 |a PALYNOLOGY 
690 1 0 |a CARBONIFEROUS 
690 1 0 |a DEPOSITIONAL SEQUENCE 
690 1 0 |a DIAMICTITE 
690 1 0 |a GLACIATION 
690 1 0 |a INTERGLACIAL 
690 1 0 |a PALEOCLIMATE 
690 1 0 |a PALYNOLOGY 
690 1 0 |a SEDIMENTOLOGY 
690 1 0 |a STRATIGRAPHY 
690 1 0 |a BLANCO BASIN 
690 1 0 |a PAGANZO BASIN 
690 1 0 |a RAISTRICKIA 
690 1 0 |a VERRUCOSISPORITES 
700 1 |a Césari, S.N. 
700 1 |a Limarino, C.O. 
773 0 |d 2010  |g v. 8  |h pp. 399-418  |k n. 4  |p Geol. Acta  |x 16956133  |w (AR-BaUEN)CENRE-8135  |t Geologica Acta 
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856 4 0 |u https://doi.org/10.1344/105.000001579  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_16956133_v8_n4_p399_PerezLoinaze  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16956133_v8_n4_p399_PerezLoinaze  |y Registro en la Biblioteca Digital 
961 |a paper_16956133_v8_n4_p399_PerezLoinaze  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
999 |c 83734 

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