description Joseph Barrell Overview
Joseph Barrell was an American geologist whose research addressed sedimentation, erosion, crustal structure, and the interpretation of geological time. In 1914 he developed a model distinguishing a strong outer lithosphere from a weaker underlying asthenosphere, terminology that became important to later explanations of isostasy and plate tectonics. He also argued that gaps in sedimentary sequences could represent long intervals of erosion or nondeposition, influencing modern stratigraphic reasoning.
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