medium-grained gravel

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• rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …   Universalium

• Geology of Taiwan — Taiwan is active geologically, showing plate boundary tectonics. The island formed at the junction of the Luzon Volcanic Arc (吕宋岛火山弧) and the Ryukyu Volcanic Arc (琉球火山弧). Subduction changes direction at Taiwan. South of the island, the Philippine …   Wikipedia

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