Rhea Silva at the South Pole is not a dual impact crater. Whoever heard of TWO (2) massive impact craters colliding with the Polar Regions? Comets and meteors travel mostly in the plane of the solar system, not at right angles to it. Impacts are far more likely to occur in equatorial regions. You have to stop seeing every roughly circular hole in the ground as an impact crater. That is not true on Earth where you have Calderas, sinkholes, volcanic plugs and plutonic intrusive bodies like granite and syenite, giving us circular and roughly circular bodies and of course weathering features like buttes and inselbergs. You will be pleased to know that Rhea Silva is none of these geological formations, so you do not have to learn about them with respect to Rhea Silva. What is Rhea Silva then? Look carefully and think again!
There are truly amazing features that your team is not seeing that can be put to use in the interpretation of all the moons and planets in our solar system, including Earth. I needed to see Vesta to understand Earth. This is always about the big picture and this is a colossal picture for planetary interpretation.
Chris Landau (geologist)
April 3, 2012
Revised April 4, 2012
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