Mouth of gorge below Hackberry Spring, looking southwest; the camera was place on the bluff shown in photo 797. Pinal County, Arizona. 1910.
Dates
Date Taken
1910
Summary
Mouth of gorge below Hackberry Spring, looking southwest; the camera was place on the bluff shown in photo 797. The gorge is cut in steeply upturned Paleozoic beds and diabase; the entrance is in Tornado limestone. At the right, just across the gravelly streambed and probably faulted down against the limestone, is some of the silty material described. It is this silt that appears to have been regarded as possibly oil bearing. Pinal County, Arizona. 1910. Plate 26-B in U.S. Geological Survey. Professional paper 115. 1919.
Summary
Mouth of gorge below Hackberry Spring, looking southwest; the camera was place on the bluff shown in photo 797. The gorge is cut in steeply upturned Paleozoic beds and diabase; the entrance is in Tornado limestone. At the right, just across the gravelly streambed and probably faulted down against the limestone, is some of the silty material described. It is this silt that appears to have been regarded as possibly oil bearing. Pinal County, Arizona. 1910. Plate 26-B in U.S. Geological Survey. Professional paper 115. 1919.
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