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| rich soil containing a relatively equal mixture of sand, silt and a smaller proportion of clay |
| process where the surface of the earth is worn away by the action of water, glaciers, winds, waves |
| shatter cone (shāt'ər) Pronunciation Key
A fractured, conical fragment of rock that has striations radiating outward from the apex. Shatter cones are believed to form when rocks are subjected to shock waves associated with a meteoric impact. They are typically between a few centimeters and a few meters long. |