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| | Excerpts from Romance to Reality: moon & Mars plans |
 | | He writes that large craters, formed soon after the moon's first cooling phase, are ancient lava dykes extruded from ring-shaped faults, while craters with no central peaks are giant burst lava bubbles formed during the second cooling phase, and craters with central peaks are volcanoes, some of which remain active. |
 | | Major craters in this region include 37-mile-wide, 10,300-foot-deep Erastothenes; 50-mile-wide, Archimedes, partially filled by lava and with a rim 4800 feet high; Stadius, a 42-mile-wide crater "nearly engulfed" by lava, so that its flat floor is only 130 feet beneath its rim; and 24-mile-wide Autolycus. |
 | | Here also are crater chains, which the text sheet calls volcanic in origin; Altai Scarp, a cliff 300 miles long and up to 6000 feet high; and the Leibnitz Mountains, with some peaks higher than Everest. |
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