tectonics :key terms
- Created by: emilyirish
- Created on: 05-12-16 13:37
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| U | N | V | G | T | R | D | B | S | V | U | V | A | F | Y | F | K | C | H | T | N |
Clues
- a theory that attempts to explain tge formation and distrubution of the earths ,ajor structural features in terms of plates that make up the surface (5, 9)
- become a hazard when they impact upon human and built environments, killing and injuring people, burying and collapsing buildings and destroying infrastureure and stopping farming (8, 7)
- discovered the mid oceanic ridge. sea floor spreading was happening. alternatibg polarity of the rocks that form the ocean crust, iron particles have erupted and alined with the earths magnetic field. the striped parretn on either side of MAR proof (3, 5, 9)
- ejection of vasts amounts of volcanic debris into the air can reduce global temperatures and is believed that this as well as the asteriod killed the dinosaurs .....yellowstone (8, 6)
- formed from ash, cinders and volcanic boms ejected from the crater. the sides are steep and symmetricial (3, 3, 6, 5)
- formed from free flowing lava. the resulting volcanoes have gentle sides to cover large areas Mauna Loa in hawaii it basically is one bog volcano (5, 6, 6)
- shock waves released by the rupture of rock strata at the focus of an earthquake. they travel through the rocks and are measured and recorded on a siesmograph (7, 5, 5)
- steep sided convex cones of viscous lava, which is rhyolitic> out reigion in centeral france (8, 9)
- very hot (800) gas charged, high velocity flows made up of a mixture of gasses and tephra (11, 5)
- where two crustal plates slide past eachother and the movement of the plates is parallel to the plate margin, no new or dead crust, no volvanoes but move causes earthquakes eg san fransisco (12, 7)
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