Physical Geology: Earth RevealedCoverage of plate tectonics is moved to the beginning of the book. The text is also used as the official Annenberg CPB distributed telecourse for physical geology.The beautiful new art program and interactive writing style will grab students' attention and further their interest in the subject. |
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Page 221
... Quartz If you have bought a watch recently , chances are it says " quartz " on it . It may have been quite inexpensive , yet it keeps time much more accurately than even the most expen- sive spring - driven watch of a decade or more ago ...
... Quartz If you have bought a watch recently , chances are it says " quartz " on it . It may have been quite inexpensive , yet it keeps time much more accurately than even the most expen- sive spring - driven watch of a decade or more ago ...
Page 260
... quartz and potassium feldspar mixed in various proportions . If the mixture is 42 % quartz ( 58 % potassium feldspar ) , melting takes place at just above 1,000 ° C . On the other hand , 1,500 ° C is needed to liquify a mixture of 75 % ...
... quartz and potassium feldspar mixed in various proportions . If the mixture is 42 % quartz ( 58 % potassium feldspar ) , melting takes place at just above 1,000 ° C . On the other hand , 1,500 ° C is needed to liquify a mixture of 75 % ...
Page 279
... Quartz is quite stable at the earth's surface . It does not weather chemically , although it is subject to mechanical weath- ering over very long periods of time . According to Bowen's re- action series , quartz is the last mineral to ...
... Quartz is quite stable at the earth's surface . It does not weather chemically , although it is subject to mechanical weath- ering over very long periods of time . According to Bowen's re- action series , quartz is the last mineral to ...
Contents
Chapter | 6 |
Box 8 | 8 |
Delivering Alaskan OilThe Environment vs the Economy | 10 |
Copyright | |
74 other sections not shown
Common terms and phrases
abyssal plains andesite asthenosphere atoms basalt basin beds beneath Benioff zone California Canyon caused chapter chemical weathering composition continental crust continental rise continental slope continents convection converging boundary cooling core craton crystal deep deposited depth dikes diverging boundary drilling earth's crust earth's surface earthquakes erosion eruptions feldspar folds fossils fracture zones gabbro geologists granite gravity heat flow horizontal hot mantle igneous rock isostatic kilometers lava flows lithosphere mafic magma magnetic anomalies mantle rock melting metamorphic rocks meteorites meters mid-oceanic ridge million mountain belt mountain ranges move normal faults occur oceanic crust oceanic trenches Photo plate boundaries plate motion plate tectonics plutonic pressure quake quartz reef regions ridge crest rift valley San Andreas fault sandstone sea floor sea level sediment sedimentary rock seismic waves shale shown in figure silicate soil solidified stress structure subducting plate temperature terrane thick turbidity currents U.S. Geological Survey uplift volcanoes