Arizona Geological Survey Digital Geologic Maps


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Published: 2020
Surficial mapping of part of the Sonoyta Valley of Organ Pipe Cactus National Monument at 1:24,000 map scale.
Resource Identifiers: DGM-74

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Published: 2020
Surficial geologic map of a portion of Organ Pipe Cactus National Monument including the Valley of the Ajo and the western flank of the Ajo Mountains. One map sheet at 1:24,000 map scale.
Resource Identifiers: DGM-73

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Published: 2020
Geologic map at 1:24,000 map scale of the surficial geology of the Armenta Well and part of the Gunsight 7.5' topographic quadrangles.
Resource Identifiers: DGM-72

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Published: 2020
Geomorphologic analyses and surficial geologic mapping provide information about the age and type of alluvial deposits on piedmonts that is critical in assessing the character of piedmont landforms...
Resource Identifiers: DGM-71

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Published: 2020
Structural measurements of deformation fabrics in Paleoproterozoic rocks within the map area were plotted on stereonets using Rick Allmendinger’s Stereonet software provided on his Cornell University...
Resource Identifiers: DGM-70

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Published: 2020
This report and accompanying maps describe the geology, geomorphology, and geologic hazards of the Maricopa area in western Pinal County, central Arizona. This mapping covers all of the Antelope...
Resource Identifiers: DGM-63

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Published: 2020
The Boundary Cone 7 ½' Quadrangle includes part of the Black Mountains and most of the piedmont between the Colorado River floodplain and the Black Mountains southeast of Bullhead City, Arizona...
Resource Identifiers: DGM-54

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Published: 2020
The bedrock geology of the map area is dominated by several sets of rock units, as follows: (1) Variably mylonitic granitic and gneissic bedrock at the north flank of the map area forms the Rincon...
Resource Identifiers: DGM-44

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Published: 2020
The Daggs Tank 7.5-minute Quadrangle is located approximately 40 miles (60 km) northwest of downtown Phoenix on the east side of Hassayampa Plain. Much of the map area consists of the western...
Resource Identifiers: DGM-39

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Published: 2020
The Buckeye NW 7.5-minute Quadrangle is located approximately 35 miles (60 km) west of downtown Phoenix. The map area covers the southwestern piedmont of the White Tank Mountains which merges to the...
Resource Identifiers: DGM-37

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Published: 2020
The McGrew Springs 7.5' Quadrangle is located in northwestern Cochise County about 45 miles southeast of Tucson, Arizona and lies south of the town of Benson. The western portion of the map...
Resource Identifiers: DGM-35

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Published: 2020
The Desert Peak 7-1/2' Quadrangle is located in southeastern Pinal County, and extreme northern Pima County, about 40 km northwest of Tucson, Arizona. It includes the extreme western edge of...
Resource Identifiers: DGM-20

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Published: 2020
The study area is located ~40 km southeast of downtown Tucson, and is bounded by the Rincon Mountains on the north, the Empire Mountains on the southeast, and the northernmost Santa Rita Mountains...
Resource Identifiers: DGM-12

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Published: 2020
The study area is located ~40 km southeast of downtown Tucson, and is bounded by the Rincon Mountains on the north, the Empire Mountains on the southwest, and the Whetstone Mountains on the...
Resource Identifiers: DGM-10

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Published: 2020
The rocks exposed in this study area represent the eastern-most exposures of the Roskruge Mountains, themselves part of a long chain of low ridges and hills extending as far north as the Silverbell...
Resource Identifiers: DGM-06

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Published: 2018
The Peppersauce Wash 7 ½' Quadrangle and the southwestern part of the Kielberg Canyon 7 ½' Quadrangle include part of the San Pedro River lowlands, flanking valley fill on both sides of...
Resource Identifiers: DGM-69 v2.0

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Published: 2018
The Clark Ranch 7½' Quadrangle and the western half of the Rhodes Peak 7½' Quadrangle include part of the San Pedro River, flanking valley fill, and bedrock on the east side of the valley...
Resource Identifiers: DGM-68 v2.0

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Published: 2018
This map depicts the geology of the Hereford and the northern part of the Stark 7 ½' quadrangles, which are located in the upper San Pedro Valley north of the U.S. - Mexico border. The...
Resource Identifiers: DGM-57 v3.0

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Published: 2018
The geology of the Davis Dam SE quadrangle reflects the complex interplay of the Colorado River and piedmont drainages that flow from the Black Mountains to join the river. The history of the...
Resource Identifiers: DGM-45

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Published: 2018
The Needles NE 7 ½' Quadrangle includes the modern and historical floodplain of the Colorado River and the lower piedmont between the river and the Black Mountains to the east. This quadrangle...
Resource Identifiers: DGM-53 v2.0

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