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Tag Archives: basins
Did big impacts disrupt heat flow in the Martian mantle?
Mars shows more than 20 impact basins with diameters of at least 1,000 kilometers (600 miles), and five of these are 2,500 km wide or larger. Based on crater counts, most of the basins appear to have occurred between in … Continue reading
Big bangs
Really large meteorites produce impact scars big enough to be called basins. Although not defined by a particular size, basins differ from smaller craters in that the floor of a basin follows the planet’s curvature. New calculations published in the … Continue reading
Chips off the old block?
Are Martian moons Phobos and Deimos escaped asteroids, as sometimes proposed? Robert Craddock (National Air and Space Museum) suggests in a paper in the February 2011 issue of Icarus they may have come from a large impact on Mars instead. … Continue reading