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.
Steubenville is located at 40Â°21â²N 80Â°37â²Wï»¿ / ï»¿40.350Â°N 80.617Â°Wï»¿ / 40.350; -80.617 (40.359, -80.614). According to the United States Census Bureau, the city has a total area of 10.63 square miles (27.53 km 2), of which 10.55 square miles (27.32 km 2) is land and 0.08 square miles (0.21 km 2) is water.