GEOL 1001 Study Guide - Final Guide: Mid-Ocean Ridge, Seafloor Spreading, Mesosaurus
Document Summary
Terms to remember: continental drift- the hypothesis that continents are mobile proposed by. *** pangaea is the supercontinent hypothesized by wegner. ***sea mounts were once volcanoes but no longer erupt, occur in chains; only the island at the end of the chain is able to erupt. *** oceanic crust is thickest near the continents, thinnest at mid ocean ridge- it is mafic. ***radio activity permits the absolute age dating of rock. ***magnetic anomalies are symmetric across a mid ocean ridge. ***sea floor spreading is the mechanism of continental drift. ***plates interact along their boundaries undergoing deformation(cracking, sliding, bending, stretching, and squashing) ***locations on earth where tectonic plates meet are identified by concentration of earthquakes. ***continental drift and sea floor spreading are caused by the movement of plates. ***continental margins far from plate boundaries are passive. ***in divergent boundaries lithosphere thickens away from ridge axis. ***in divergent boundaries sea floor spreading causes plates to move apart.
