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originally posted by: symptomoftheuniverse
a reply to: wildespace
Could the asteroid have landed in water?
Meteorites on Mars have been estimated to decompose completely from chemical weathering on a one-Gyr timescale [Bland and Smith, 2000].
originally posted by: Aleister
a reply to: ionwind
Your illustration shows only a little bit of water when, as I envision it, the whole thing was full of water. Mt. Sharpe is a sediment mountain, made from water, and look how high it rises past your illustrated puddle. /goes looking for Martian rubber duckie/
For this illustration, the possible extent was estimated by mapping ancient lake and stream deposits and recognizing that water flowed from the crater rim into the basin (arrows). The water would have pooled in the linear depression created between the crater rim and Mt. Sharp. The area's history likely included the coming and going of multiple lakes of different sizes as climate conditions evolved.
originally posted by: ionwind
I've never heard of the entire crater being filled with water, do you have a source or link?