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Zimmerman, Robert C.

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Album caption and index card: Reach of Hot Springs Canyon with perennial flow at location 51. Valley-floor vegetation consists of mesquite and burrobrush. Cochise County, Arizona. ca. 1965. Published as Figure 16 in U.S. Geological Survey. Professional Paper 485-D. 1969.
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Album caption and index card: Red Silt Wash in the NW1/4 sec. 31, T. 15 S., R. 20 E. Width of the channel is 6 feet. Average and maximum depths of the alluvium are 9 and 11 inches. The dark deposit is basin fill. Cochise County, Arizona. ca. 1965. Published as Figure 19 in U.S. Geological Survey. Professional Paper 485-D. 1969.
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Album caption and index card: Savanna composed primarily of mesquite, yucca, and catclaw acacia growing in T. 14 S., R. 20 E. Note the grass cover and the smoothness of the slope. The substrate is sandy to gravelly loams overlying gravelly to cobbly terrace alluvium. View toward northeast; south end of the Galluro Mountains in distance. Cochise County, Arizona. August 1965. Published as Figure 8 in U.S. Geolgoical Survey. Professional Paper 485-D. 1969.
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Album caption and index card: Soza Canyon at the confluence with the San Pedro River (foreground). The underflow emerges as a short stream. The conglomerate crops out above the terrace in the background. Cochise County, Arizona. August 30, 1965. Published as Figure 3 in U.S. Geological Survey. Professional Paper 485-D. 1969.
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Album caption and index card: Valley-floor vegetation of Ash Creek near location 77. Trees are mainly walnut, mesquite, and desert-willow. Large walnut in the center of the picture has a diameter at breast height (4.5 feet) or 5 feet. The water table in this reach of Ash Creek is about 60 feet deep. Cochise County, Arizona. ca. 1965. Published as Figure 15 in U.S. Geological Survey. Professional Paper 485-D. 1969.
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