PETROLOGY TERMS

Petrology is a discipline of geology that studies rocks, minerals and the processes that act on them. Scientists focus on the formation of rocks in this field of science.
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Clay

Clay, an earthy material composed of very small particles of weathered rock. The particles are less than 0.00015 inch (0.004 mm) in diameter, much smaller than sand particles.

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  • Travertine

    Travertine

    Travertine, a soft, compact or porous form of limestone. It is usually pale yellow, but may be dark yellow, brown, or streaked with light and dark bands because of impurities. See more »

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