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26 Cards in this Set
- Front
- Back
Granite
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textural term applied to coarse-and medium-grained igneous rock
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Basalt
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fine grained igneous rock
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crust
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outer shell of solid Earth. The outermost layer of crust is composed of sediment deposits and basaltic rocks.bottom is mohorovicic discontinuity.
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Divergent Boundary
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move apart
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convergent Boundary
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when two plates come together
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transform plate boundary
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shifting plate
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trenches
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long narrow deep depression of the ocean floor.
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Seamounts
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elevation rising 900 meters or more from the ocean bottom
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island arc
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island chain thats curved. trench on the convex side. assosciated with volcanoes and subduction zones.
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midocean ridge
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great median arch or sea bottom swell extending the length of an ocean basin and roughly paralleling the continental margins; area of oceanic crustal formation
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Rift Valley
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narrow trough formed by faulting in a divergence area
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Density
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mass per unit volume of a substance
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Pillow Lava
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a characteristic form of lava extruded underwater, where the molten rock forms lumpy rounded forms resembling pillows
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Spreading Rates
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rates at which the sea floor spreads
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Hawaii
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islands which are formed by hotspots
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pearl Reef
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island of hawaii
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Aleutian trench
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trench near europe
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East Pacific rise and the Mid atlatic Ridge
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places where robert ballard did the testings
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hydrothermal vents
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associated with high temperature groundwaters for example alteration or precipitation of minerals and mineral ores
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Photosynthesis vs. chemosynthesis
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photosyntisis using living things use the sunlight while chemosynthesis uses the heat sulfate acid to produce sugar
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Alfred Wegner
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thought of the theory of continental drift and pangea
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Laurasia, gondwanaland and pangea
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triassic period of continental drift
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deep sea drilling project and the Glomar Challenger
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helped scientist discover geology and about the deep sea ocean floor
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Microfossils and Core samples
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helped the scientists discover the ocean sea floor
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Continent
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land that's on the continental plates
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Alvin and Robert Ballard
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saw the first living organisms in the deep sea near the hydrothermal vents
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