Answer:
One of the best-preserved records of these events is in the bottom of the Grand Canyon—in a package of sedimentary strata known as the Tonto Group.
Explanation:
The founders of Pennsylvania <span>believed that religious tolerance was a great virtue</span>
The cascades mountains are part of the Pacific Ring of Fire, the volcanoes are associated mountains around the Pacific Ocean. Volcanic activity
The troposphere is the atmosphere where most of the weather system occur.
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