Shock-lithification of unconsolidated rock materials.

Loose quartz grains packed around chemical explosives are forced during cratering explosions into compacted, coherent masses resembling sand stone blocks found at certain meteorite craters. Sandstone-like lumps found at the Wabar (Arabia) meteorite craters are similar to these shock-lithified sands. Shock-lithification by impact may be effected on Moon as large meteorites strike surfaces covered with rubble from earlier collisions.