Contemporary Physical Geology |
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Page 292
Harold Leonard Levin. American Plate 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 . ( After ...
Harold Leonard Levin. American Plate 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 . ( After ...
Page 293
Harold Leonard Levin. Mid - oceanic ridge 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 plate . A and A ' are reference ...
Harold Leonard Levin. Mid - oceanic ridge 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 plate . A and A ' are reference ...
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 ...
Contents
Contents Overview 1 The Scope and Substance of Geology | 1 |
Minerals | 20 |
Igneous Rocks and Processes | 52 |
Copyright | |
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accumulation amount areas atoms basaltic bedrock beds beneath calcium called cause cent chemical clay color composed composition continental continents core Courtesy crystals debris deep-sea deposits depth develop dissolved dolostone dunes earth earthquake eroded erosion eruptions example fault feldspar Figure floodplains flow folds formation fossils geologists glacial glaciers gradient grains granite gravity groundwater igneous rocks ions iron island Lake land lava layers limestone lithosphere located magma magnetic mantle margins mass wasting material melting ment metamorphic rocks meters mid-oceanic ridges minerals mountain move movement occur ocean floor oceanic crust origin oxygen particles plagioclase plane plate plate tectonics pressure quartz reef regions relatively result rhyolite rise River S-waves sand sandstone sea floor sea level sedi sediment sedimentary rocks seismic shale silicate slope soil strata stream structures tectonic temperature texture tion transport trenches tures U.S. Geological Survey valley velocity volcanic water table waves weathering wind