Areas of volcanic activity that are not located at plate boundaries and do not change position are called <u>hotspots</u>.
Hotspots are regions of volcanic activity that are not near plate boundaries and do not move. In forming the surface of the Earth, volcanic activity has been largely responsible. Volcanism, particularly in the western states, is responsible for much of the land's natural beauty, mineral wealth, and soil fertility.
In volcanic activity the volcanic rocks blanketed nearly all of the western states of Washington, Oregon, California, Nevada, Arizona, Utah, Idaho, and major areas of Montana, Wyoming, Colorado, New Mexico, and Texas at some point in the last 70 million years. Even older volcanic rocks, which have been significantly deformed and metamorphosed, can be found in practically every state.
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The Richter magnitude<span> scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of</span>earthquakes<span>. The </span>magnitude<span> of </span>an earthquake<span> is determined from the logarithm of the amplitude of waves recorded by seismographs.</span>
Answer: 5 years, but not sure
Is that all of the question? if so the answer is true
Answer:
C
The older the rock, the deeper into the ground it is going to be.