AP Environmental Science Mr. Grant Lesson 90. Earth’s Mineral Resources & Mining Methods and Their Impact (Part 1). Objectives:. Define the terms placer mining and mountaintop removal mining . Outline types of mineral resources and how they contribute to our products and society.
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Earth’s Mineral Resources
Mining Methods and Their Impact (Part 1)
A mining technique that involves sifting through material in modern or ancient riverbed deposits, generally using running water to separate lightweight mud and gravel from heavier metals of value.
Mountaintop Removal Mining
A large-scale form of coal mining in which entire mountain-tops are leveled. The technique exerts extreme environmental impact on surrounding ecosystems and human residents.
Minerals are nonrenewable, so we need to be aware of their finite and decreasing supplies
Tantalite ore is mined, processed into tantalum, and used in electronic devices
Strip mining removes soil
Discolored water is a sign of acid drainage
One Utah mine is 2.5 mi across and 0.75 mi deep; almost half a million tons of ore and rock are removed each day
An area the size of Delaware has already been removed