20
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Middle Miocene closure of the Central American Seaway.

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Uranium-lead geochronology in detrital zircons and provenance analyses in eight boreholes and two surface stratigraphic sections in the northern Andes provide insight into the time of closure of the Central American Seaway. The timing of this closure has been correlated with Plio-Pleistocene global oceanographic, atmospheric, and biotic events. We found that a uniquely Panamanian Eocene detrital zircon fingerprint is pronounced in middle Miocene fluvial and shallow marine strata cropping out in the northern Andes but is absent in underlying lower Miocene and Oligocene strata. We contend that this fingerprint demonstrates a fluvial connection, and therefore the absence of an intervening seaway, between the Panama arc and South America in middle Miocene times; the Central American Seaway had vanished by that time.

          Related collections

          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          1095-9203
          0036-8075
          Apr 10 2015
          : 348
          : 6231
          Affiliations
          [1 ] Universidad de los Andes, Bogotá, Colombia. cmontes@uniandes.edu.co.
          [2 ] Universidad Nacional de Colombia, Medellín, Colombia.
          [3 ] Smithsonian Tropical Research Institute, Ciudad de Panamá, Panamá.
          [4 ] Universidad de Caldas, Manizales, Colombia.
          [5 ] University of Houston, Houston, TX 77004, USA.
          [6 ] Washington State University, Pullman, WA 99164, USA.
          [7 ] Corporación Geológica Ares, Bogotá, Colombia.
          [8 ] Universidad de los Andes, Bogotá, Colombia.
          [9 ] Ecopetrol, Bogotá, Colombia.
          Article
          348/6231/226
          10.1126/science.aaa2815
          25859042
          Copyright © 2015, American Association for the Advancement of Science.

          Comments

          Comment on this article