It depends a lot on local atmospheric conditions, and also what that stuff looked like before vanishing.
Being a hard, white, shiny substance that existed as a solid in the relative warmth of martian summer and only sublimed after being exposed to air or sunlight over the course of hours, means that it's not the other prime candidate, frozen CO2. It's just way too warm for CO2, even before it was uncovered.
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(no subject)
Date: 2008-06-20 12:57 pm (UTC)but it's neat all the same.
(no subject)
Date: 2008-06-20 12:59 pm (UTC)And now it's done so.
(no subject)
Date: 2008-06-20 03:32 pm (UTC)Being a hard, white, shiny substance that existed as a solid in the relative warmth of martian summer and only sublimed after being exposed to air or sunlight over the course of hours, means that it's not the other prime candidate, frozen CO2. It's just way too warm for CO2, even before it was uncovered.
(no subject)
Date: 2008-06-20 07:56 pm (UTC)