GEOG 1010 Lecture 13: Lecture13
Document Summary
Earthquakes under the mountainous continental side (edge of south american plate) of a subduction zone reveal the depth to the subducting nazca plate when plotted . Usually volcanic activity around convergent & underwater divergent plate tectonic boundaries. Hot spots form where narrow columns (plumes) of unusually hot mantle convectively rise from the core-mantle boundary. These trails of volcanic seamounts in the pacific fit well in the fixed spot mantle-plume model. Other data indicate that plumes move slowly, if at all.
