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Rock Crossword

Across
is a metallic element used to make computer chips and other electronic equipment.
very hard, granular, crystalline, igneous rock. Often used as a building stone.
Wood that has been embedded in the ground for a long period of time
a hard sedimentary rock, but easily dissolved
is a metamorphic rock composed of recrystallized carbonate minerals
Sedimentary rock derived from mud. Commonly finely laminated
Down
sedimentary rock consisting of sand or quartz grains cemented together, typically red, yellow, or brown in color.
a hard, dark, glass-like volcanic rock formed by the rapid solidification of lava without crystallization.
Is a soft metallic element. It is very dense.
Today it is used for making wire, tubing, and coins to name a few. Long ago it was combined with tin to create bronze.