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File:Museo de La Plata - Nódulo de pedernal, Estructura sedimentaria.jpg

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Español: Nódulo de pedernal, Estructura sedimentaria. Precipitación quimica de silice dentro de otros sedimentos. Muy usado para fabricar puntas de flechas, Rio Paraná, Misiones, Argentina.
English: Flint nodule, sedimentary structure. Chemical precipitation of silica within other sediments. Much used to make arrowheads. Rio Paraná, Misiones, Argentina.
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Source Nódulo de pedernal, Estructura sedimentaria
Author Beatrice Murch from Buenos Aires, Argentina

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This image, originally posted to Flickr, was reviewed on 4 May 2009 by the administrator or reviewer Juliancolton, who confirmed that it was available on Flickr under the stated license on that date.

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current19:43, 4 May 2009Thumbnail for version as of 19:43, 4 May 20093,872 × 2,592 (2.3 MB)Barcex (talk | contribs){{Information |Description= {{es|Nódulo de pedernal, Estructura sedimentaria. Precipitación quimica de silice dentro do otros sedimentos. Muy usado para fabricar puntas de flechas, Rio Paraná, Misiones, Argentina.}} |Source=[http://www.flickr.com/pho

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