Show movements of the earth the continents stand at tin an average hight of about feet above the bean bottom and their weights weight causing a pressure ot of to pounds per square inch on oil their bases Is supposed to be causing a slow ci coping of the land into the sea against the pounds of pressure by ahr water it at the bottom the rocks ot of mines are arc observed to creep under less pressure in re recent experiments peri ments two hemispheres ot of rock were mere fitted together by plane surfaces and a caty was ground in one or a steel washer was ihla 4 wt vit it and the hemispheres mere ere then forced together b bj hydraulic pressure continued for mouths months at room temperature it was that a pressure of 0 pounds per square inch will close even vinall cavities in ID granite era nife basalt ob adlan or |