Carbonates can form without life. Rain water can dissolve CO2 from the air and calcium from the ground and deposit calcium carbonate in the right environmental conditions. Like in a cave or in concrete parkades or in dry soils as caliche:
http://en.wikipedia.org/wiki/Caliche_(mineral) On Fri, 3 Oct 2008 04:16:03 -0700 (PDT) [email protected] wrote: > Ok.....since there are carbonates, similar to limestones....does this > mean that there was once life on Mars? > Or did these carbonates come from other sources? > Could one of our esteemed geologists explain this to us laymen? > -- Lyndon Tiu --------------------------------------------------------------------- Visit our website: http://texascavers.com To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
