found: LC database, Mar. 4, 2005(lunar craters; craters of the Moon; impact craters on the Moon; Moon craters)
found: Lunar Orbiter : impact crater geology, via WWW, Mar. 4, 2005(Impact craters are produced by the collision of a meteorite or comet with the surface of the Moon, which ejects material and leaves behind a crater)
found: Surface properties of the Moon, via WWW, Mar. 4, 2005("Both the Maria and the Highlands exhibit large craters that are the result of meteor impacts. There are many more such impact craters in the Highlands ... Each well-preserved Lunar crater is surrounded by a sheet of ejected material called the ejecta blanket.")
