This collection of photos shows the Richinbar mine in the 1930s and a revisit to the mine in 1957 by the Wheeler family. Carlton Wheeler graduated from the University of Oklahoma after WWI and worked as a geologist in Texas before moving his family to Arizona and working for the Richinbar mine. Most of the photos were taken in '33, '34, and '35. The Richinbar mine stopped operations in 1937.

Edwin Noel Pennebaker received a B.S. in economic geology from University of California in 1924 and later went on to graduate studies. From the mid 1920s until the mid 1980s, he worked mainly as a consulting geologist for numerous companies around the globe. During the period 1935 to 1976, he consulted for a number of companies in Arizona. After 1985, he was Director Emeritus of Coeur d'Alene Mines Corporation, Wallace, ID. This collection of economic geologic reports focuses predominantly on Arizona.

Geologic maps of the Silver Mountain in the Copperopolis and Columbia 7.5 minute quadrangles.

Geologic map and geochemical data for the Bradshaw Mountains in the Mayer-Crown King area of Yavapai County, Arizona. Map scale 1:24,000

This geologic map cover the southeastern ends of Big Chino Valley and Big Black Mesa and part of Page Flat and Hell Canyon in Yavapai County, north of Prescott.

This geologic map covers much of southeastern Big Chino Valley and a small part of Big Black Mesa in Yavapai County, north of Prescott.

Occurrences of known non-metallic mineral occurrences in Arizona. Map Scale: 1:1,000,000.

Statewide map of Arizona showing major mineral production site for 2002.

Powerpoint presentation of "Mapping of Holocene River Alluvium along the Verde River, Central Arizona", 28 slides. Presented at the 2011 Arizona Hydrological Society Meeting in Flagstaff, Arizona, 20 September 2011. For geologic map sheets and report see: Mapping of Holocene River Alluvium along the Verde River, Central Arizona @ http://repository.azgs.az.gov/uri_gin/azgs/dlio/999

In 2010, the Arizona Geological Survey (AZGS) released a series of 1:24,000-scale geologic strip maps showing the extent of Holocene channel and floodplain deposits along the Verde River and five large tributaries in central Arizona. The primary purpose of this mapping was to contribute to the legal differentiation of river subflow from groundwater in surrounding areas, as Arizona courts have established the lateral extent of Holocene river alluvium as a key component in delineating subflow zones. These maps also define the physical architecture and geomorphic framework of the river systems, depicting river and tributary deposits of Holocene to late Pliocene age, Pliocene and older basin filling deposits, and various bedrock units. We employed standard geomorphic and geologic criteria to differentiate and map river and tributary alluvial deposits of different ages. The degree of clast rounding, lithologic diversity, and landform/terrace slope were used to differentiate river from piedmont alluvium.