This page last updated on 26-Aug-2015 EENS 1110 Physical Geology Tulane University Prof. Stephen A. Nelson Continental Drift, Sea Floor Spreading and Plate Tectonics
Vocabulary (from USGS Visual Glossary and Photo Glossary of Volcanic words) Accretionary wedge—Sediments, the top layer of material on a tectonic plate, that accumulate and deform where oceanic and continental plates collide. These sediments are scraped off the top of …
Before GPS how did we know the plates were moving? Figure 2: Plate velocities from Plate Boundary Observatory (PBO) A.)LEFT—Map of the western U.S. shows movement across the San Andreas fault zone in California (Red arrows indicate direction and rate of relative motion; yellow lines = active faults) .