The Tecopa Lake Beds were extensively explored for nitrates during both World Wars. Sometime between 1914 and 1922, Levi Noble dug several trenches, approximately 1 m deep, to test the nitrate and chemical composition of the lake beds (Noble and others, 1922). In April 1999, Calzia and Troxel relocated Noble's trench Z CH-1. Assuming the trench was dug in 1918, the average erosion recoverability rate of the Tecopa Lake Beds is greater than 12 mm/yr during the last 81 years.
 between 1914 and 1922. The trench is approximately 1 m deep (Noble, 1922, Plate XXV). |
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