GRS IR 701 Lecture Notes - Lecture 5: Basalt, Olivine, Viscosity

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Most of the ea(cid:396)th(cid:859)s seafloo(cid:396) has (cid:271)ee(cid:374) (cid:396)e(cid:272)y(cid:272)led (cid:271)a(cid:272)k i(cid:374)to the (cid:373)a(cid:374)tle (cid:894)t(cid:396)ue(cid:895) Greater the distance to an earthquake epicenter, the longer the time period between primary and secondary waves (true) As a graduate student, atwater was the first to explain the accepted origin of the san andreas fault (true) The san andreas fault is a boundary between north american and pacific plates, the latter presently moving northward toward the aleutian trench (true) The appalachian mountains represent the remnants of a himalayan-type mountain chain, formed from 3 stages of island arc and continental collision, stretched from dallas to west. Continental collision results in a double thickness of continental crust, the formation of unusually high mountains within the interior of a continent, the end of subduction, a fault suture marked by fault-bounded slabs of serpentinite. The difference in magnitude between earthquakes with richter and/or moment magnitudes 2 and 5 is 1000.

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