Earthquakes and faults

It was known that there were faults, regions in the Earth's crust where two dissimilar sets of rock came together. A "reverse fault theory" was proposed, explaining that faults exist before earthquakes and earthquakes occur due to pressure on the fault.
 Harry Fielding Reid United States 1911 Earthquakes and faults

It was known that there were faults, regions in the Earth's crust where two dissimilar sets of rock came together. A "reverse fault theory" was proposed, explaining that faults exist before earthquakes and earthquakes occur due to pressure on the fault.