Geology Found by Mars Rover at Ancient Hot Spring Deposit Resembles Earth Biosignatures

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Yazata, Nov 24, 2016.

  1. Yazata Valued Senior Member

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    http://www.nature.com/articles/ncomms13554#abstract

    The authors (at Arizona State University) say:

    "The morphology of HomePlate [the Martian site] digitate silica structures bears a strong resemblance to the microbially mediated microstromatolites at El Tatio [a Chilean desert comparison site]."

    But they go on to say,

    "However, determining the relative contribution of biotic and abiotic influences in the formation of a particular stromatolite can be quite difficult and must be assessed on a case-by-case basis. Entirely abiogenic internally laminated columnar structures have been synthesized via numerical modeling and laboratory spray paint deposition experiments, complicating the effort to interpret such structures in the pre-Cambrian rock record on Earth."
     
    Last edited: Nov 24, 2016

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