📁 地质年代学

The topic of geologic time and techniques and tools to measure geologic time, including radiometric dating techniques.

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Geology 376 - 2001 Field Trip

http://members.tripod.com/reubs376_2001/

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Meteor Crater

http://www.meteorite.com/meteor_crater/

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Reuben Johnson's K/T Expedition -- 2001

http://members.tripod.com/reubskt53715/

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Terrestrial Impact Craters

http://www.lpi.usra.edu/publications/slidesets/craters.html

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