Surficial Geologic Map and Flood Hazard Assessment, Rainbow Valley, Maricopa County, Arizona, v 1.0
Issue Date
2009Keywords
Arizona Geological Survey Digital Geologic MapsWaterman Wash
Maricopa County
Arizona
Rainbow Valley
geologic hazards
Flood Hazard
piedmont
Quaternary Geology
bedrock geology
surficial geology
geomorphology
Geology
Early Tertiary
Recent
Pleistocene
Holocene
Quaternary
Sierra Estrella
flood hazard level
floodplain
river terraces
colluvium
alluvial fan
Sonoran Desert National Monument
Palo Verde Mountains
Booth Hills
Mobile Valley
Metadata
Show full item recordCitation
Pearthree, P.A., Youberg, A., and Shipman, T.C., 2009, Surficial Geologic Map and Flood Hazard Assessment, Rainbow Valley, Maricopa County, Arizona: Arizona Geological Survey Digital Geologic Map DGM-71, version 1.0, map scale 1:24,000, 13 p. and 3 map sheets.Publisher
Arizona Geological Survey (Tucson, AZ)Description
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 and the nature and extent of piedmont flood hazards. Piedmonts in Maricopa County are covered by complex mosaics of surficial deposits with different physical characteristics related to the ages of the deposits. Surficial geologic maps differentiate alluvial deposits based on physical characteristics of the deposits (sediment size and character) and geomorphic characteristics of the upper surfaces of the deposits. Differences in the primary physical characteristics of surficial deposits result from differences in rock types in drainage basins and differences in the size and character of the stream system that transported the sediment. Surficial deposits are subsequently altered by processes including weathering, soil development, and local erosion, so the character of the surface and near-surface portion of the deposits is related to the length of time that the deposits have been exposed at the surface. Simply stated, active fluvial systems leave behind evidence of their activity in the form of young deposits. Thus, surficial geologic maps are very useful in defining the physical framework of active fluvial systems on piedmonts.Additional Links
http://repository.azgs.az.gov/uri_gin/azgs/dlio/631Language
enSeries/Report no.
DGM-71Rights
Arizona Geological Survey. All rights reserved.Collection Information
Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.North Bounding Coordinate
33.3883South Bounding Coordinate
33.0206West Bounding Coordinate
-112.698East Bounding Coordinate
-112.151Collections
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