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Monday, October 19, 2020 | History

7 edition of Argentine precordillera found in the catalog.

Argentine precordillera

sedimentary and plate tectonic history of a Laurentian crustal fragment in South America

by Keller, Martin

  • 111 Want to read
  • 21 Currently reading

Published by Geological Society of America in Boulder, CO .
Written in English

    Places:
  • South America.
    • Subjects:
    • Geology -- South America.,
    • Rocks, Sedimentary -- South America.,
    • Plate tectonics -- South America.

    • Edition Notes

      Includes bibliographical references.

      StatementMartin Keller.
      SeriesSpecial paper ;, 341, Special papers (Geological Society of America) ;, 341.
      Classifications
      LC ClassificationsQE230 .K45 1999
      The Physical Object
      Paginationv, 131 p. :
      Number of Pages131
      ID Numbers
      Open LibraryOL59106M
      ISBN 100813723418
      LC Control Number99087173

      The Early and Middle Ordovician Orthocerida and Lituitida of Precordilleran Argentina are described, and their systematics and paleogeographic significance are revised. ISBN: OCLC Number: Description: pages: illustrations ; 26 cm. Contents: The proto-Andean margin of Gondwana: an introduction / R. J. Pankhurst and C. W. Rapela --Stratigraphical evidence supporting the rifting, drifting and collision of the Laurentian Precordillera terrane of western Argentina / R. A. Astini --The stratigraphical record of the Argentine.

        Argentina has long played an important role in the continent’s history. Following three centuries of Spanish colonization, Argentina declared independence in , and Argentine nationalists were instrumental in revolutionary movements elsewhere, a fact that prompted 20th-century writer Jorge Luis Borges to observe, “South America’s independence was, to a great extent, an Argentine. Middle Ordovician K–bentonites discovered in the Precordillera of Argentina: Geochemical and paleogeographical implications, in Cooper, J.D., Droser, M.L., and Finney, S.C. (Eds.), Ordovician Odyssey: Short papers for the Seventh International Symposium on the Ordovician System, B The Pacific Section Society for Sedimentary Geology.

        César Aira, The Literary Conference tr. Katherine Silver (New Directions ) You’ve probably already heard how awesome Aira is, and how everyone should read at least one of his many, many books. If you’ve had trouble deciding which to pick up first, though, I’d definitely recommend The Literary Conference, in which a mad scientist (and erstwhile translator, natch) infiltrates said. Paleomagnetism is the study of the fossil magnetism in rocks. It has been paramount in determining that the continents have drifted over the surface of the Earth throughout geological time. The fossil magnetism preserved in the ocean floor has demonstrated how continental drift takes place through the process of sea-floor spreading. The methods and techniques used in paleomagnetic studies of.


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Argentine precordillera by Keller, Martin Download PDF EPUB FB2

Argentine Precordillera: Sedimentary and Plate Tectonic History of a Laurentian Crustal Fragment in South America (GSA Special Paper ) | Martin Keller | download | B–OK.

Download books for free. Find books. Location. Precordillera is a Spanish geographical term for hills and mountains lying before a greater range. The term is derived from cordillera (mountain range)—literally "pre-mountain range"—and applied usually to the Andes. The Precordillera is in western Argentina and can be traced by the thrust-fold belt.

It is about km wide, and stretches km from latitude 29°S to 33°S in. Argentine Precordillera: sedimentary and plate tectonic history of a Laurentian crustal fragment in South America. The Argentina Precordillera is a north-south trending, ∼50 km wide orogenic wedge involving Paleozoic through late Cenozoic sedimentary rocks uplifted in six major east-verging thrust sheets (Fig.

1B) (Allmendinger et al.,Jordan et al.,Ramos et al., ).Cited by: Argentine Precordillera O. BORDONARO The Cambrian rocks of the Argentine Precordillera are analyzed and updated providing a new stratigraphic inter-pretation.

The lithostratigraphic assemblages provide evidence that the Precordilleran Cambrian Basin was a rimmed platform. The lithostratigraphy record enables to distinguish three large areas. Statistical comparisons of conodont faunas from many parts of the world were carried out Argentine precordillera book an effort to Argentine precordillera book light on one of the most discussed, and most controversial, problems in the lower Paleozoic geology of South America, namely, the geographic origin of the exotic terrane in western Argentina known as the Precordillera.

The Argentine Precordillera is a thin-skinned, mainly east-verging fold and thrust belt, constituted predominantly by Paleozoic and Cenozoic deposits. The present morphology is controlled by Andean (Neogene—Recent; Jordan et al., ), north-striking, westward-dipping imbricate faults, responsible for east-west shortening of at least 50%.

The Precordillera of Western Argentina (see Figures 2–6), as part of the Cuyania Terrane, constitutes a typical "thin–skinned" high level thrust–and–fold belt. It was formed during the Andean (Tertiary) crustal shortening, where mostly E–directed imbrications are combined with folding and involve a pile of Cambrian to Tertiary sediments.

Stratigraphic, palaeontologic, and palaeomagnetic data support a hypothesis that argues for the Argentine Precordillera rifting from the southwestern margin of Laurentia in low latitudes during the Cambrian, migrating across the Iapetus Ocean, colliding with the Gondwanan margin in the late Middle Ordovician, and receiving glaciogenic sediments in the Late Ordovician.

Upper Floian conodonts from three sections in Central Precordillera are reported. • The Oepikodus evae and O. intermedius zones are recorded. We documented the Early Ordovician conodont B. hubeiensis for the first time. The Microzarcodina n. is reported in the Precordillera.

We provide significant data related to the Precordillera palaeobiogeographic ties. The Precordillera thrust belt of western Argentina, in contrast, is located km from the Chile Trench and just km above the subducted Nazca plate. Thus the amount of crust to work with when attempting to balance the shortening in the thrust belt is significantly less than elsewhere, raising questions about how and where the shortening.

Martin Keller, "Argentine Precordillera: Sedimentary and Plate Tectonic History of a Laurentian Crustal Fragment in South America", Argentine Precordillera: sedimentary and plate tectonic history of a Laurentian crustal fragment in South America, Martin Keller.

Allmendinger, R.W., Phoebe A. Judge. "The Argentine Precordillera: A foreland thrust belt proximal to the subducted plate." Geosphere 10 (6): Allmendinger, R.W., Phoebe A Judge.

"Stratigraphic Uncertainty and Errors in Shortening from Balanced Sections in. The Precordillera region is located in the South American continental plate above the horizontal subduction of the Nazca plate and to the east of the Main and Frontal Cordilleras, where active volcanism ceased since the last – My (Kay and Abbruzzi, ; Ramos and Folguera, ).The style of upper crustal deformation of the Precordillera is described as a thin-skinned fold-thrust.

The Early Ordovician conodont faunas from the Cerro La Chilca and Las Chacritas river sections (Central Precordillera) have been studied and compared. INTRODUCTION There seems to be a general consensus that the Argentine Precordillera represents a continental fragment that was rifted from the Ouachita embayment in Laurentia and subsequently accreted to Western Gondwana, present western South America (Astini et al., a).

Considering the contributions on Darriwilian conodont biostratigraphy developed by Heredia (), Mestre (, a, b), Heredia (a, b, ), and Heredia et al.

(), it is obvious that. The Argentine Precordillera is a thin-skinned, mainly east-verging fold and thrust belt, constituted predominantly by Paleozoic and Cenozoic deposits.

The present morphology is controlled by. ASTINI, RA., The Argentine Precordillera-lower plate of the Ouachita conjugate-pair rift: a suitable explanation for their stratigraphic differences. Geol. Soc. South-Cenfral Meeting. Book. Dec ; Tips on the SW-Gondwana margin: Ordovician conodont-graptolite biostratigraphy of allochthonous blocks in the Rinconada mélange, Argentine Precordillera Neopaleozoic.

PDF | On Jan 1,J.L. Benedetto and others published A collisional model for the stratigraphic evolution of the Argentine Precordillera during the early Paleozoic | Find, read and cite all.Explores the tectonics interaction among the exotic terrians between Laurentia and Southwest Gondwana.

The authors reveal data that sheds light on pre-Pangea connections between Laurentia and Southwest Gondwana. These data concern the presence of Ollenelus and associated fauna in the Precordillera of central Western South America; the common early Paleozoic paleomagnetic data.

In addition, Precambrian rocks also crop out in the Precordillera and Frontal Cordillera of western Argentina, in the hills of Buenos Aires province, in the Patagonian Cordillera, in a few places along the coast of Santa Cruz, and in Cape Meredith on the Falkland Islands.