Contemporary Physical Geology |
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Page 292
Harold Leonard Levin. American Plate Nazca Plate Figure 11-13 Locations of mid - oceanic ridges ( red ) and trenches ( blue ) . Note frac- ture zones offsetting the ridges . Dashed lines in Africa represent the East African Rift Zone ...
Harold Leonard Levin. American Plate Nazca Plate Figure 11-13 Locations of mid - oceanic ridges ( red ) and trenches ( blue ) . Note frac- ture zones offsetting the ridges . Dashed lines in Africa represent the East African Rift Zone ...
Page 293
Harold Leonard Levin. Mid - oceanic ridge increasing age of oceanic crust Figure 11-14 Sea floor spreading . As the rift widens , basaltic lavas rise to fill the space and solidify to become a new part of the trailing edge of a tectonic ...
Harold Leonard Levin. Mid - oceanic ridge increasing age of oceanic crust Figure 11-14 Sea floor spreading . As the rift widens , basaltic lavas rise to fill the space and solidify to become a new part of the trailing edge of a tectonic ...
Page 474
... mid - oceanic ridge or at a hot spot and progressively move away from their original location as they are conveyed by lithospheric plates . As the volcanoes are con- veyed down the flank of the ridge or subside isostatically , their ...
... mid - oceanic ridge or at a hot spot and progressively move away from their original location as they are conveyed by lithospheric plates . As the volcanoes are con- veyed down the flank of the ridge or subside isostatically , their ...
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accumulation activity amount areas atoms basaltic base basins beds beneath building calcium called carbon carried cause changes chemical clay color composed composition continental continents Courtesy crust crystals deposits depth develop direction earth earthquake effect elements erosion example fault Figure floor flow folds formation geologic geologists glaciers grains granite gravity ground igneous important increase indicate ions iron kinds Lake land lava layers less limestone located lower magnetic mantle margins mass material melting ment metamorphic meters minerals mountain move movement named natural North occur ocean origin particles pattern planes plants plate Pleistocene present pressure produced quartz range regions relatively result ridges rise River rock sand sandstone sediment sedimentary shale side silicate slope soil strata stream structure surface Survey temperature termed tion transport United valley volcanic waves weathering wind zone