Ground-penetrating radar detection of small-scale channels, joints and faults in the unconsolidated sediments of the Atlantic Coastal Plain

Douglas Everett Wyatt, T. J. Temples

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The geological characterization of the shallow subsurface in the unconsolidated sediments of the Atlantic Coastal Plain, and other unconsolidated sediment regimes, may involve jointing, faulting, and channeling not readily detectable by conventional drilling and mapping. A knowledge of these features is required in environmental, geotechnical, and geomorphological studies. Ground-penetrating radar (GPR) may be used to routinely map these structures. 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, orientation, and fill material. Vertical joints may not be visible to radar unless they are wider than the sampling interval or are filled with radar-opaque materials such as limonite. Angled joints or fractures may be distinguished by an apparent continuous reflector on the radar profile. Faulting on radar profiles may be observed by the offset of reflectors, the image of the fault plane, or the coherent interpretation of a fault system.

Original languageEnglish (US)
Pages (from-to)219-225
Number of pages7
JournalEnvironmental Geology
Volume27
Issue number3
DOIs
StatePublished - Jan 1 1996

Fingerprint

ground-penetrating radar
radar
ground penetrating radar
coastal plains
coastal plain
Sediments
Radar
paleochannel
sediments
sediment
faulting
Faulting
drilling
scour
fault plane
fill
Scour
detection
sampling
Drilling

Keywords

  • Environmental characterization
  • Faulting
  • Ground-penetrating radar
  • Unconsolidated sediments

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Pollution
  • Soil Science

Cite this

Ground-penetrating radar detection of small-scale channels, joints and faults in the unconsolidated sediments of the Atlantic Coastal Plain. / Wyatt, Douglas Everett; Temples, T. J.

In: Environmental Geology, Vol. 27, No. 3, 01.01.1996, p. 219-225.

Research output: Contribution to journalArticle

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