Sentences with phrase «crushed rock material»
Bright features such as these are caused by the presence of freshly crushed rock material that was excavated and deposited during the highly energetic collision of a meteoroid with Mercury to form an impact crater.
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However: he may specify that the drain will use 18 inches of 1.5» drain rock, but he uses (and intends to use) 18 mm of 3/8» crushed rock, and that is a material fact.