Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia
The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided...
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| 001 | PAPER-23469 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518205509.0 | ||
| 008 | 190411s2012 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84858337753 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a PPPYA | ||
| 100 | 1 | |a Limarino, C.O. | |
| 245 | 1 | 0 | |a Depositional environments and vegetation of Aptian sequences affected by volcanism in Patagonia |
| 260 | |c 2012 | ||
| 270 | 1 | 0 | |m Limarino, C.O.; Departamento de Geología, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, (1428) Buenos Aires, Argentina; email: limar@gl.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a The continental deposits of the Baqueró Group preserve one of the most abundant Aptian floras on the southern margins of Gondwana. These floras represent an extinct biome that was subject to increasing regional volcanism. In combination with the presence of shallow water bodies, this biome provided suitable environments for the preservation of imprints and compressions of foliage together with permineralized trunks and palynofloras. Eight facies associations were identified in nine sections, characterizing the evolution of lacustrine and fluvial environments under intense volcanic activity. In addition, three depositional sequences were defined, with the purpose of establishing a chronostratigraphic framework to which the positions of the fossiliferous levels identified in the different sections can be referred. A 206 Pb/ 238 U age of 114.67±0.18Ma from the upper depositional sequence constrains the succession as no younger than the late Aptian and probably represents an interval of 4-5Myr, during which the vegetation was affected by increasing biotic stress conditions. A qualitative analysis of the palynological assemblages and plant remains allowed a reconstruction of the dynamics of the vegetation developed during the deposition of the Baqueró Group. Volcanic activity appears to have had relatively moderate effects on the biota, at least at the Order level. Nevertheless, low species richness is observed toward the top of the Baqueró Group, reflecting an increase in adverse environmental conditions. The possible interpretations of the assemblages identified as biozones or, in contrast, biofacies related to changeable environmental conditions are discussed herein. © 2012 Elsevier B.V. |l eng | |
| 536 | |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica, 32320, PICT 169 | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP 0512 | ||
| 536 | |a Detalles de la financiación: Valuable information on the study area was provided by Dr. S. Archangelsky, to whom this paper is dedicated. The authors are grateful to Professor Jane Francis for carefully reading and correcting the manuscript, and the anonymous reviewers for their valuable comments. Thanks are given to the Empresa Piedra Grande S.A. staff for providing lodging during our first field trip in the area, particularly to Lic. Claudio Iglesias for his valuable cooperation. Amalia González collaborated in the drawing of the location map. This work was supported by ANPCyT ( PICT 169 and 32320 ) and CONICET ( PIP 0512 ). | ||
| 593 | |a Departamento de Geología, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, (1428) Buenos Aires, Argentina | ||
| 593 | |a Instituto de Investigaciones en Biodiversidad y Medioambiente, CONICET-UNCo, Quintral 1250. (R8400FRF) S.C. de Bariloche, Argentina | ||
| 593 | |a Comisión Nacional de Energía Atómica, Regional Patagonia, 26 de Noviembre s/n o, (9100) Trelew, Argentina | ||
| 593 | |a Museo Argentino de Ciencias Naturales B. Rivadavia, Av. Ángel Gallardo 470., (C1405DJR) Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a APTIAN |
| 690 | 1 | 0 | |a BAQUERO GROUP |
| 690 | 1 | 0 | |a MACROFLORA |
| 690 | 1 | 0 | |a PALYNOLOGY |
| 690 | 1 | 0 | |a PATAGONIA |
| 690 | 1 | 0 | |a SEQUENCE STRATIGRAPHY |
| 690 | 1 | 0 | |a AGE DETERMINATION |
| 690 | 1 | 0 | |a APTIAN |
| 690 | 1 | 0 | |a BIOFACIES |
| 690 | 1 | 0 | |a BIOME |
| 690 | 1 | 0 | |a BIOZONATION |
| 690 | 1 | 0 | |a CHRONOSTRATIGRAPHY |
| 690 | 1 | 0 | |a DEPOSITIONAL ENVIRONMENT |
| 690 | 1 | 0 | |a ENVIRONMENTAL CONDITIONS |
| 690 | 1 | 0 | |a EXTINCTION |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a PALEOBOTANY |
| 690 | 1 | 0 | |a PALEOECOLOGY |
| 690 | 1 | 0 | |a PALEOENVIRONMENT |
| 690 | 1 | 0 | |a PALYNOLOGY |
| 690 | 1 | 0 | |a PRESERVATION |
| 690 | 1 | 0 | |a RECONSTRUCTION |
| 690 | 1 | 0 | |a SEQUENCE STRATIGRAPHY |
| 690 | 1 | 0 | |a SPECIES RICHNESS |
| 690 | 1 | 0 | |a VEGETATION DYNAMICS |
| 690 | 1 | 0 | |a VEGETATION HISTORY |
| 690 | 1 | 0 | |a VOLCANISM |
| 690 | 1 | 0 | |a PATAGONIA |
| 700 | 1 | |a Passalia, M.G. | |
| 700 | 1 | |a Llorens, M. | |
| 700 | 1 | |a Vera, E.I. | |
| 700 | 1 | |a Loinaze, V.S.P. | |
| 700 | 1 | |a Césari, S.N. | |
| 773 | 0 | |d 2012 |g v. 323-325 |h pp. 22-41 |p Palaeogeogr. Palaeoclimatol. Palaeoecol. |x 00310182 |w (AR-BaUEN)CENRE-1607 |t Palaeogeography, Palaeoclimatology, Palaeoecology | |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/j.palaeo.2012.01.021 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00310182_v323-325_n_p22_Limarino |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v323-325_n_p22_Limarino |y Registro en la Biblioteca Digital |
| 961 | |a paper_00310182_v323-325_n_p22_Limarino |b paper |c PE | ||
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| 963 | |a VARI | ||
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