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Reno Voss
Pág. 167 - 189
In the region of the southern Salar de Antofalla (Catamarca Province, northwestern Argentina), Late Eocene to Pliocene/(?)Pleistocene successions are exposed with thicknesses of up to 1,600 m. They consist of fluvial, lacustrine and eolian sediments with...
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Alberto Garrido,Alejandro Kramarz,Analía Forasiepi,Mariano Bond
Pág. 482 - 510
We present here the recent advances in understanding the stratigraphy and age of the Cenozoic volcanic and sedimentary sequences exposed on the area of sierra Huantraico ? sierra Negra and cerro Villegas (Pehuenches Department, Neuquén Province). Stratig...
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Rodrigo L. Tomassini,Claudia I. Montalvo,Elisa Beilinson,Daniel Barasoain,Gabriela I. Schmidt,Esperanza Cerdeño,Alfredo E. Zurita,Ricardo A. Bonini,Ángel R. Miño-Boilini,Luciano L. Rasia,Germán M. Gasparini
Pág. 22 - 56
Arenas Blancas is a poorly known fossiliferous site located in the lower reach of the Chasicó creek (Buenos Aires Province, Argentina), with great relevance from a biostratigraphic viewpoint. The Macrochorobates scalabrinii Biozone was defined in this si...
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Liang Xiao, Jian Wang, Deshuang Ji, Liyan Guo, Xing Wang, Jiaqi Liang, Xiaoyuan Xia, Wenxiu Ren and Xiangchuan Li
With a series of Cenozoic climate fluctuations, the global paleoclimate shifted from a warm climate to a cold climate, causing Arctic ice caps to be formed. The Late Miocene is a critical time in this transition period, in which the climate was rapidly c...
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Yibing Li, Xinyu Liu, Weiwei Chen and Liang Yi
Biogenic reefs and carbonate platforms are valuable natural resources, playing an important role in modulating the global climate and in carbon cycles through biological processes. Biogenic reefs in the Xisha (Paracel) Islands began in the late Oligocene...
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Juan M. Robledo,Maricel Y. Horn,Claudia I. Galli,Luisa M. Anzótegui
Pág. 418 - 429
The continental sedimentary rocks that constitute the Palo Pintado Formation of the late Miocene from Salta province, presents a great paleoclimatic interest due to the environmental conditions prevailing during this geochronologic interval. The geologic...
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Gerrit Lohmann, Martin Butzin and Torsten Bickert
We examine the role of the vegetation cover and the associated hydrological cycle on the deep ocean circulation during the Late Miocene (~10 million years ago). In our simulations, an open Central American gateway and exchange with fresh Pacific waters l...
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Michel Sallaberry,David Rubilar-Rogers,Mario E. Suarez,Carolina S. Gutstein
Pág. 147 - 154
The fossil skull of a procellariid, Pachyptila sp., from Late Miocene marine sediments of the Bahía Inglesa Formation (Midde Miocene-Pliocene) of Northern Chile is described. The fossil is compared with extant species of the family Procellariidae. This d...
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Luciano Luis Rasia,Ricardo A. Bonini,Adriana M. Candela
Pág. 430 - 445
In this work, we present two new records of Lagostomus from the late Miocene of Argentina. A right mandible from the Huachipampa Formation (Loma del Camello, San Juan Province) is assigned to Lagostomus telenkechanum, previously recorded in the Arroyo Ch...
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Juan Manuel Álvarez Cerimedo,Darío Orts,Emilio Rojas Vera,Andrés Folguera,Germán Bottesi,Víctor A. Ramos
Pág. 504 - 520
The eastern Andean orogenic front at 36ºS shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-...
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Jeny Alejandra Grajales,Ángel F. Nieto-Samaniego,Andrés Tassara,Jairo Alonso Osorio,Luis Ernesto Ardila,Juan Fernando Martínez
Pág. 218 - 246
Several authors have interpreted the Colombian Pacific margin as a succession of oceanic terrane accretions, with generation of forearc basins under a compressive-transpressive tectonic regime during the Late Cretaceous-Miocene. New data acquired in the ...
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Jorge Munoz,Rosa Troncoso,Paul Duhart,Pedro Crignola,Lang Farmer,Charles R. Stern
Pág. 177 - 203
The mid-Tertiary Coastal Magmatic Belt in south-central Chile, which crops out both in the Central Valley and, south of 41°S, in the Coastal Cordillera as far west as the Pacific coast, formed when the locus of Andean magmatic activity expanded, both to ...
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Dmitry A. Ruban
The Late Miocene evolution of the Eastern Paratethys Sea was marked by significant palaeogeographical transformations. The knowledge of them should be improved with the information from the peripheral parts of this semi-enclosed marine basin. The study a...
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Lucia Sagripanti,German Bottesi,Diego Kietzmann,Andres Folguera,Victor Ramos
Pág. 201 - 219
The orogenic front at 37ºS has been mainly formed through at least two contraccional stages, as inferred from the exhumed major angular unconformities at the Late Eocene and the Late Miocene times respectively. A Late Cretaceous event is restricted to th...
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Charles R. Stern,Ricardo Floody,Domingo Espineira
Pág. 1 - 22
Mafic Mg-olivine (Fo88)+hornblende lamprophyre dikes, with Ni ~190 ppm and Cr ~390 ppm, cut late Miocene lavas in the Quebrada los Sapos a few kilometers west of the El Teniente Cu-Mo mine. These dikes have petrochemical affinities with other less primit...
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Geoffrey May,Adrian J. Hartley,Guillermo Chong,Fin Stuart,Peter Turner,Stephanie J. Kape
Pág. 33 - 58
New 40Ar/39Ar radiometric, sedimentological and structural data from post-Paleocene sedimentary strata in the Calama Basin, northern Chile suggest that the established lithostratigraphy of the basin-fill requires revision. A new lithostratigraphic scheme...
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Constantino Mpodozis,Paula Cornejo,Suzanne M. Kay,Andrew Tittler
Pág. 273 - 313
RESUMEN. La Franja de Maricunga, de 200 km de largo, portadora de mineralizacion de metales preciosos, se extiende en el borde occidental del Altiplano de Copiapo (26-28°S) y representa el frente volcanico Oligoceno-Mioceno de la zona sur de los Andes Ce...
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Constantino Mpodozis,Paula Cornejo,Suzanne M. Kay,Andrew Tittler
Pág. 273 - 313
RESUMEN. La Franja de Maricunga, de 200 km de largo, portadora de mineralizacion de metales preciosos, se extiende en el borde occidental del Altiplano de Copiapo (26-28°S) y representa el frente volcanico Oligoceno-Mioceno de la zona sur de los Andes Ce...
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Marcelo Alfredo Reguero,Adriana M. Candela,Claudia I. Galli,Ricardo Bonini,Damian Voglino
Pág. 56 - 70
Late Miocene fluvial strata of the Palo Pintado Formation are broadly exposed to the northwest of the town of Angastaco, Salta province, Northwest of Argentina. These strata accumulated in the extensional Angastaco Basin. Recent field work at the Palo P...
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Jose Piquer,Juan Carlos Castelli,Reynaldo Charrier,Gonzalo Yanez
Pág. 32 - 53
The Cenozoic geologic evolution of the central part of the Cordillera Principal at ~35°S, is intimately related to the geodynamic evolution of deep crustal structures, which during different stages controlled the deposition of volcanosedimentary sequence...
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