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.
Senecaville, OH Profile: Facts, Map & Data. Senecaville, Ohio - Basic Facts. The Village of Senecaville had a population of 458 as of July 1, 2016. The primary coordinate point for Senecaville is located at latitude 39.9348 and longitude -81.4595 in Guernsey County. The formal boundaries for the Village of Senecaville (see map below) encompass a land area of 0.47 sq. miles and a water area of 0 sq. miles.