GEL 1 Lecture Notes - Lecture 8: Atlantic Ocean, Continental Crust, Volcanic Arc
Document Summary
)hy do they occur where they do? hint: the answer is not plate tectonics (cid:840)too simple + not specific(cid:841) Every place that we have deep ocean trench, we find a series of earthquakes that progressively get deeper and deeper as you move further away from the trench. Deepest earthquakes in the middle of continents. Matches with where we find mid-ocean ridges, deep ocean trenches, and earthquake occurrence. Volcanic activity of the pacific ocean is emblematic of much of the volcanic activity we see in the world. Directly related to how plates are moving along continental margins. Along japan, korea, aleutian island of alaska, n) of usa and canada, western part of south america. Rheology based earth you can differentiate different layers of the earth not just what they"re made out of, but ho) different layers of the earth beha(e. Composition of earth based on layer behavior. Moho has rapid increase in seismic velocity.
