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Q

 

Site where stone, rock and construction materials are extracted. Open-pit operation.

 

One of the most common of all minerals, quartz can be found in almost any color and transparency. Quartz is primarily composed of silicon dioxide and comes in such well known variaties as amethyst, bloodstone, citrine, agate, adventurine and many more.

 
Quartzites

Hard, somewhat glassy-looking rock made up almost entirely of quartz. Metamorphosed quartz sandstone and chert are quartzites.

 
Quaternary
The most recent Period of the Cenozoic Era. Encompasses the time interval of 1.6 million years ago through today.
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