Anarrow channel or slab of a mineral that is different from the surrounding rock is called a?

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

What part did glaciers play in forming the great lakes?

Explain: plate tectonics and people.