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A multi-scale approach to understanding desert piedmonts using cosmogenic isotopes and centimeter-scale surveying Kyle Nichols Department of Geology.

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Presentation on theme: "A multi-scale approach to understanding desert piedmonts using cosmogenic isotopes and centimeter-scale surveying Kyle Nichols Department of Geology."— Presentation transcript:

1 A multi-scale approach to understanding desert piedmonts using cosmogenic isotopes and centimeter-scale surveying Kyle Nichols Department of Geology

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3 Approach Short-term (50 yrs.) maps Long-term (10 3 to 10 4 yrs.) isotopes Small-scale (m) Large-scale (km) N/A 12 3

4 Global Positioning Systems (GPS; left) Accelerator Mass Spectrometery (AMS; top)

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6 Desert Training Center 1942 to 1944 Over 1,000,000 men Over 1,000,000 men 12 base camps 12 base camps Size of Vermont Size of Vermont

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10 Why use Iron Mountain? 2 years channel alteration (Army tanks, marching soldiers, etc.) No significant disturbance since Discrete time-frame of channel response to intense use (1944 to present). Ability to survey channels on the centimeter scale using differential Global Positioning System.

11 Centimeter-scale topographic mapping 6 Control Plots - representative of piedmont channels outside of Camp Iron Mountain 6 Walkway Plots - representative of piedmont channels forming in areas of intense foot trafficked areas 6 Road Plots - representative of piedmont channels forming down- gradient of road berms

12 Control Area

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14 Typical Walkway Area

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16 Typical Road Area

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19 Channel orientations Control Plots Walkway Plots Road Plots

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