GEOG 001 Lecture Notes - Lecture 15: Cascadia Subduction Zone, Alpine Fault, Himalayas
19 Aug 2020
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Document Summary
Two plates move away from one another and new lithosphere is created. Typically occurs at mid-ocean ridges and is called sea-floor spreading. An oceanic-continental collision occurs where one of the converging plates is oceanic and the other is continental. The higher density plate is drawn down/subducts into the mantle. Where the edges of two plates slide horizontally past one another. The fault along which the movement takes place is known as a transform fault. San andreas fault in california, north anatolian in turkey , alpine. Triple junction: places on earth where three plates border one another. Hot spots: anchored in the slowly moving deep mantle; nearly stationary source of heat within the mantle that is the source of volcanic activity at specific, fixed points on earth"s surface. Counties along the pacific ring of fire which borders the pacific ocean are at a high risk of earthquakes: southwest canada, western us, mexico, japan , taiwan, etc.
