GLY 2010C Lecture 22: gly 2010 ch22
Document Summary
The measures of ________ tell geologists that there are differences within earth velocity. Seismic tomography shows that ________ are seismically slower ridge areas. Most hot spots (mantle plumes) are located in? two dense zones. Seismic tomography shows the attitude of _________ subducting lithospheric plates. Within igneous rocks, ________ rocks transmit waves more slowly than ________, and ________ are the most rapid of all felsic mafic ultramafic. For a given material (mantle peridotite, for example) and pressure/depth __________ differences can be used to determine _________ differences velocity temperature. In continental crust? oceanic - 5-20 km beneath earth"s surface continental - 25-85 km beneath earth"s surface. What is the low velocity zone (lvz)? a less rigid zone thought to be near it"s melting point. What does the lvz mark? it marks the boundary between the lithosphere and asthenosphere. The 1888 charleston sc earthquake was felt in gainesville with a v on the modified mercalli scale.
