Contemporary Physical Geology |
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Page 42
... Olivine Olivine , another ferromagnesian mineral , was mentioned earlier as having isolated silicon- oxygen tetrahedra bonded together by iron or mag- nesium ions or both . Olivine contains variable pro- portions of iron and magnesium ...
... Olivine Olivine , another ferromagnesian mineral , was mentioned earlier as having isolated silicon- oxygen tetrahedra bonded together by iron or mag- nesium ions or both . Olivine contains variable pro- portions of iron and magnesium ...
Page 54
... olivine and calcium - rich plagioclase minerals like bytownite . As crystallization proceeds , olivine reacts with the melt to form pyroxene , pyroxene reacts to form amphibole , etc. The plagioclase minerals also react with the ...
... olivine and calcium - rich plagioclase minerals like bytownite . As crystallization proceeds , olivine reacts with the melt to form pyroxene , pyroxene reacts to form amphibole , etc. The plagioclase minerals also react with the ...
Page 269
... olivine . At shallow depths in the mantle , olivine is stable in the form shown in ( A ) ( this is the form of olivine found at the earth's surface ) . When the pressure reaches a critical value corresponding to a depth of about 400 km ...
... olivine . At shallow depths in the mantle , olivine is stable in the form shown in ( A ) ( this is the form of olivine found at the earth's surface ) . When the pressure reaches a critical value corresponding to a depth of about 400 km ...
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