--> Abstract: Environmental Characterization of Shallow Channels, Joints and Faults in Unconsolidated Sediments Using Ground Penetrating Radar, by D. E. Wyatt and T. J. Temples; #90950 (1996).

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Abstract: Environmental Characterization of Shallow Channels, Joints and Faults in Unconsolidated Sediments Using Ground Penetrating Radar

Douglas E. Wyatt, Tom J. Temples

Environmental and geological characterization of the shallow subsurface in unconsolidated sediments may involve structures not readily detectable by conventional drilling and mapping techniques. A knowledge of these structures is required in environmental and geotechnical studies related to characterization, remediation and risk assessment programs. These features may act as preferential pathways for groundwater flow or as direct conduits to the water table. Ground Penetrating Radar (GPR) may be used to map these structures in favorable sediments.

Three principal shallow subsurface features are readily detectable using GPR; paleochannels, joints or fractures, and faults. The detection of paleochannels is dependent on the scale of the GPR survey and the attitude of the channel within the survey area. Channel morphological features such as scour surfaces, point bars and thalwegs are observable. Joints and fractures are more difficult to detect depending upon size, patterns,

AAPG Search and Discovery Article #90950©1996 AAPG GCAGS 46th Annual Meeting, San Antonio, Texas