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Laguna Amarga
South America

Laguna Amarga es una laguna mesosalina, endorreica, somera (profundidad máxima 4 m) con un área actual de 3,18 km2. En las laderas de la cuenca se observan 7 paleolineas de costa que evidencian fluctuaciones del nivel lacustre. Laguna Amarga es el hábitat de extensas colonias vivas de estromatolitos, análogos de los antiguos fósiles que se encuentran en numerosas rocas a partir del Arqueano. Los estromatolitos nos permiten estudiar y contemplar verdaderos fósiles vivientes, aumentando el conocimiento de los orígenes de la vida en la Tierra. Los estromatolitos son depósitos órgano sedimentarios laminares que resultan de la acreción de comunidades microbianas bénticas que atrapan sedimentos y/o forman focos para la precipitación mineral. Los biominerales que se forman en los estromatolitos de Laguna Amarga involucran diferentes tipos de carbonatos Aragonito, Dolomita y Naprolita. La proliferación de dichos organismos en condiciones extremas permite inferir que ellos son los primeros postulantes de ser encontrados en ambientes extraplanetarios como la agresiva atmosfera de Io o las antiguas paleo cuencas de Marte que posiblemente estuvieron rellenas con aguas ricas en carbonatos.

Copyright: Marcio cabral
Type: Spherical
Resolution: 11000x5500
Subida: 29/06/2011
Actualizado: 20/05/2014
Número de vistas:

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Tags: laguna amarga; patagonia; chile; torres del paine; guanacos; glaciares
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