Plate Tectonics is a theory developed in the late 1960s, to explain how the outer layers of the Earth move and deform. The theory has caused a revolution in the way we think about the Earth. Since the development of the theory, geologists have had to reexamine almost every aspect of Geology. Plate tectonics has proven to be so useful that it can predict geologic events and explain almost all aspects of what we see on the Earth.
Steubenville is a city in and the county seat of Jefferson County, Ohio, United States. Located along the Ohio River, it had a population of 18,659 at the 2010 census.
Lake County, Ohio. Lake County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 230,041. The county seat is Painesville. The county was established on March 6, 1840, from land given by Cuyahoga and Geauga Counties. Its name is derived from its location on the southern shore of Lake Erie.