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Title: The identification of rock types in an arid region by air photo patterns
Authors: Ehlen, Judy, 1944-
Keywords: Air Photo Interpretation
Arid Region
Rock Type Identification
Issue Date: Jun-1981
Publisher: U.S. Army Engineer Topographic Laboratories.
Engineer Research and Development Center (U.S.)
Series/Report no.: ETL ; 0261.
Description: Research note
Abstract: Air photo pattern criteria to identify rock types in an arid environment were evaluated for their usefulness and accuracy by stereo air photo analysis and field verification. The criteria came from published literature and from unpublished in-house research. In general, the unpublished criteria proved the most useful. New criteria to identify granitic rocks were successfully tested, and criteria for quartzite and andesitic rocks were identified. In addition, a basis was laid to develop criteria to identify metamorphic rocks by composition on aerial photography.
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