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.
Beallsville /ËbÉlzvÉ¨l/ is a village in Monroe County, Ohio, United States. As of the 2010 census, the village population was 409. The village gained national attention during the Vietnam War by having lost six of its 475 citizens to the war, the worst per-capita loss of life experienced by any place in the country.