All mountains are made up of rocks and all rocks of minerals (compounds that cannot be broken down except by chemical action). Of the approximately 2,000 known minerals, seven rock-forming minerals make up most of the earth's crust: quartz and feldspar make up granite and sandstone; olivene and pyroxene give basalt its dark color; and amphibole and biotite (mica) are the black crystalline specks in granitic rocks. Except for calcite, found in limestone, they all contain silicon and are often referred to as silicates.
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Real Life Survivor Man Reveals All His Secrets In This Tell-All Report To Surviving In The Wilderness And What EVERYONE Should Know If They Become Lost In The Woods In Order To Save Their Lives! Have you ever stopped to think for a minute what it would be like to become lost in the woods and have no one to rely on but your own skills and wits?