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Lower member of the Martin formation as exposed in a road cut on US. Highway 60 north of the Salt River; the brown beds are in the lower third of the cut. The upper two- thirds of the cut shows the thin-bedded gray dolomitic limestones and shale partings of the light buff weathering beds. Gila County, Arizona. February 15, 1944. Figure 13, in U.S. Geological Survey. Professional paper 233-D. 1952.
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Rubble breccia in the massive member of the Redwall limestone exposed in a road cut on US Highway 60. The limestone blocks are separated by red sandy mudstone. Gila County, Arizona. February 2, 1944. Figure 23, in U.S. Geological Survey. Professional paper 233-D. 1952.
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Persian water well, a widely used type of open well in Pakistan. Well generally are shallow but at some places are as deep as 200 feet. Naturally bare sand in foreground and background contrast strongly with irrigated crops. Photo by S.A.T. Kazmi. Pakistan. c. 1963. Figure 7 in U.S. Geological Survey. Water-supply paper 1608-K. 1970. Upper right photograph page 41, Images of the U.S. Geological Survey, 1879-1979.
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Contact between the Martin formation and the Redwall limestone in the Flying "V" Canyon; the Redwall limestone forms the overhanging ledge at the top of the exposure, and the upper member of the Martin formation is shown in the middle and foreground. There is no obvious unconformity between the Redwall limestone and the green shaly beds of the Martin formation. Gila County, Arizona. March 1, 1944. Figure 19, with graphics, in U.S. Geological Survey. Professional paper 233-D. 1952.
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Chert breccia in the base of the Naco formation exposed north of the Salt River; the stadia rod is 15 feet long. Gila County, Arizona. March 11, 1944. Figure 24, in U.S. Geological Survey. Professional paper 233-D. 1952.
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A composite of these photographs: View of the Devonian and Mississippian rocks exposed in the north wall of the Salt River canyon at the Prochow mines; the gray cliffs on the sky line are Redwall limestone, of Mississippian age, and the slopes below these cliffs are formed by the Martin formation, of Devonian age, which rests unconformably on the pre-Devonian diabase exposed in the canyon and in the foreground. Gila County, Arizona. February 8, 1944. Figure 12, in U.S. Geological Survey. Professional paper 233-D. 1952.
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Contact between the Redwall limestone of Mississippian age, and the basal member of the Naco formation, of Pennsylvania age in road cut on US Highway 60, north of the Salt River. The contact shows no sign of faulting and is interpreted as one side of a filled sinkhole. Gila County, Arizona. March 4, 1944. Figure 20, with graphics, in U.S. Geological Survey. Professional paper 233-D. 1952.


    map background search result map search result map Lower member of the Martin formation as exposed in a road cut on US. Highway 60. Gila County, Arizona. 1944. Contact between the Redwall limestone of Mississippian age. Gila County, Arizona.  1944. Lower member of the Martin formation as exposed in a road cut on US. Highway 60. Gila County, Arizona. 1944. Contact between the Redwall limestone of Mississippian age. Gila County, Arizona.  1944.