1-3 Science

when a body of salt water dries up, minerals are left behind . As the water evaporates, the minerals crystallize. Example: gypsum and halite

high temperatures and pressures deep below the ground can cause the minerals in rock to change into different minerals. Example: garnet graphite talc magnetite

surface water and ground water carry dissolved minerals into lakes or seas. The minerals can crystallize on the bottom of the lake or sea. Example: calcite and dolomite

water underground can be heated by hot rock. The hot rock water can dissolve some minerals and deposit other minerals in their place. Example: gold copper sulfur pyrite galena

melted rock cam cool slowly under earth’s surface. As the melted rock cools, minerals form. Example: mice feldspar quartz

used to remove ores that are near earth’s surface

used to remove ores that re deep underground

used to remove large, near surface deposits of gold and copper

are open mines that are used to remove sand, gravel, and crushed rock

are often used to mine coal

nonmetallic mineral that are considered valuable because of their beauty or rarity

a small amount of an element not usually found in the mineral

a natural material whose concentration of economically valuable minerals is high enough for the material to be mined profitably

the process of returning land to its original condition after mining is completed