pink shale sedimentary rock on white background. shale is often a red or gray rock made of mostly clay minerals.

rock isolated white background stone outdoor garden decoration result alteration preexisting response changing environmental conditions variations temperature pressure subtraction components mineral geology ore nature texture crystal carbon material macro raw object natural granite mining close-up gray limestone sedimentary earth’s surface contrast igneous earth diorite magma molten crystallizes volcanoes melted crust subjected mineral-rich commonly combination consisting essentially manganese important brown conglomerate clastic pre-existing pieces once-living organisms deposits accumulate earth's piece shale hand holding specimen red clay minerals pink background minerals