HMMMM .... What do you think nonrenewable resources are? Break it down... Nonrenewable? Resource?
Earth scientists have identified over 3000 minerals. These minerals are, however, NONRENEWABLE RESOURCES - their supply is limited and cannot be replaced. RENEWABLE RESOURCES , such as air, water and plants can be replaced within a human lifetime.
NONRENEWABLE RESOURCES A nonrenewable resource is a natural resource that cannot be re-made or re-grown at a scale comparable to its consumption.
Ores form in the crust in a variety of ways. As magma cools, dense METALLIC minerals sink to the BOTTOM . Layers accumulate and form ORE DEPOSITS within the hardened magma. FORMATION OF ORES:
Some ores form through CONTACT METAMORPHISM . Sometimes hot MINERAL SOLUTIONS spread through small cracks in rocks and form bands called VEINS . LODE : A large number of thick mineral veins.
ORES & WATER: The movement of water helps form ore deposits in TWO ways: 1. Streams carry fragments of minerals (i.e. gold) until they get DEPOSITED by weak CURRENTS . Fragments become concentrated and form PLACER DEPOSITS . 2. Water dissolves MINERALS in the earths crust, and then carry the dissolved minerals until it reaches a placer deposit where it accumulates.
JEWELRY - Sapphires, Rubies, Diamonds JEWELRY - Gold, Silver, Platinum BUILDING MATERIAL - Calcite, Gypsum USES OF MINERAL RESOURCES:
- Fall '19
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