Preliminary Report on a Uranium Occurrence and Regional Geology in the Cherry Creek Area, Gila County, Arizona Page: 4
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the microscope in order to determine their mineral composition.
The purpose of the study was to determine any relationship of the
mineralized area to regional structure and stratigraphy. The writer
is indebted to R. J. Schwartz of the Atomic Energy Commission and
H. C. Granger of the U. S. Geological Survey for information re-
ceived and general discussions concerning the region.
The mapped area, about ten square miles, is approximately 36
miles north of Globe, Arizona (fig. 1). This is in the vicinity of the
Black Brush mine, which is in Section 4, Township 6 North, Range
14 East, Salt River Meridian, Gila County, Arizona (pl. I).
Topography and Climate
Elevations in the area range from about 3, 700 to 7, 500 feet. Topo-
graphic features at higher elevations consist of flat-topped mountains
and steep canyon walls. Lower slopes are moderately rounded and
commonly covered with debris from the high canyon walls. The area
studied is situated near the transition zone between the Colorado
Plateau and the Basin and Range physiographic provinces (1), and
characteristics of both provinces are evident in the region.
The climate is semi-arid to arid and vegetation consists mainly
of sage, numerous cacti and other desert plants, and several varieties
of conifers. Conifers are ample in the higher elevations for use as
Sedimentary rocks in the area consist of the Scanlan conglomerate,
Pioneer formation, Barnes conglomerate, Dripping Spring quartzite,
and Mescal limestone of the Apache group of Precambrian age, the
Troy quartzite of Cambrian age, and some Tertiary and Quaternary channel
fill. Diabase and granite comprise the remaining rock types. More than
one stage of faulting has been recognized and recurrent movement on
some fault zones is apparent on the lower slopes of Cherry Creek canyon.
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Sharp, Byron J. Preliminary Report on a Uranium Occurrence and Regional Geology in the Cherry Creek Area, Gila County, Arizona, report, July 1956; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc783667/m1/6/: accessed January 17, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.