raw specimen of rhyolite extrusive igneous rock stone on white background.

rock soil geology iron flooring art asphalt boulder wall jewellery stonewall floor pattern wood formation terrain bedrock raw specimen andesite volcanic stone isolated white background railway ballast shortened volcanics scientific contexts formed lava erupted volcano mineral coal nature granite black fossil carbon macro object natural rough fuel ore solid texture close-up hard hand extrusive igneous crush stones civil engineer plutonic intrusive fragment engineer39aph39s rhyolite paving used attach rail sleepers page prev1 456 39next sample geologist39aph39s age background