Due to the force of the tectonic plates that occurred about the 4.5 billion years, the geology of the North American plate reveals the upwelling a the collision of the plants and thus the western U.S has a rough texture as compared to the smooth central and eastern regions.
<u>That has created the 12 main geologic provinces like the Columbia Plateau, the Basin and Range, Colorado Plateau, the Rocky Mountains, and the Laurentian Upland, Interior Plains, and the Interior Highlands. The colorado plateau lies in the upper northern and the central side and the basin and the provinces cover much of the boundaries of the places along the pacific.</u>
These cycles are described as the collective changes that take place due to the effects of the earth's movements on its climate which prevails over the thousand of years.
The earth's rotation on the axis and the revolution around the sun involve the gravitational attraction thus creates variation and complex cycles. So the distance between the earth's and the sun and the moon create s variation as seen by the seasons.
It is associated with the timing of the northern lights and the shift in the temperatures of the surface waters of the midlatitudes of the pacific ocean.
