Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrounded by horsts and half-horsts, which are now the Picacho, Casa Grande, Silverbell, and Sacaton mountains. It formed mainly in response to late Miocene extension. Internal drainage probably persisted until about 3 million years ago. Several thousand meters of sediments fill the basin; 2000 m of evaporites and claystone form the bulk of the basin fill (Scarborough and Pierce, 1978). The upper 200 meters or so of basin fill was deposited by a gradually aggrading, regionally integrated drainage system. Young alluvium of the Santa Cruz River is up to 30 m thick and is found within 3.2 km of the modern channel (Pool, 1986). Although the Picacho Ba...
These nine maps depict the general ages and distribution of Quaternary geomorphic surfaces and assoc...
The San Pedro River flows through the rugged landscape of San Pedro Valley from the U.S. – Mexico bo...
Rocks of the mountains paralleling the San Pedro River Valley in the Tres Alamos Dam Site area range...
This is geologic map data for the Picacho Reservoir quadrangle. It was formerly published as a bundl...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
The Picacho Mountains are north-south trending mountain range completely surrounded by Quaternary al...
The Picacho Mountains are a north-south trending mountain range in southeastern Arizona that is comp...
This report accompanies a digital geologic map of the Picacho, Picacho SW, Picacho NW, and Hidden Va...
Geologic maps have traditionally emphasized bedrock rather than unconsolidated sediments, the latter...
This item was digitized from a paper original and/or a microfilm copy. If you need higher-resolution...
The upper Santa Cruz basin in southern Arizona is typical of the Basin and Range province0 Mountains...
Like most river valleys, that of the Santa Cruz River contains a complex history of erosion, deposit...
These nine maps depict the general ages and distribution of Quaternary geomorphic surfaces and assoc...
The San Pedro River flows through the rugged landscape of San Pedro Valley from the U.S. – Mexico bo...
Rocks of the mountains paralleling the San Pedro River Valley in the Tres Alamos Dam Site area range...
This is geologic map data for the Picacho Reservoir quadrangle. It was formerly published as a bundl...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
Surficial geologic maps of the Picacho Basin. The Picacho basin is a large and complex graben surrou...
The Picacho Mountains are north-south trending mountain range completely surrounded by Quaternary al...
The Picacho Mountains are a north-south trending mountain range in southeastern Arizona that is comp...
This report accompanies a digital geologic map of the Picacho, Picacho SW, Picacho NW, and Hidden Va...
Geologic maps have traditionally emphasized bedrock rather than unconsolidated sediments, the latter...
This item was digitized from a paper original and/or a microfilm copy. If you need higher-resolution...
The upper Santa Cruz basin in southern Arizona is typical of the Basin and Range province0 Mountains...
Like most river valleys, that of the Santa Cruz River contains a complex history of erosion, deposit...
These nine maps depict the general ages and distribution of Quaternary geomorphic surfaces and assoc...
The San Pedro River flows through the rugged landscape of San Pedro Valley from the U.S. – Mexico bo...
Rocks of the mountains paralleling the San Pedro River Valley in the Tres Alamos Dam Site area range...