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Linear geologic structure and magic rock discrimination as determined from infrared dataColor infrared photographs of the Beartooth Mountains, Montana show the distribution of mafic dikes and amphibolite bodies. Lineaments that cross grassy plateaus can be identified as dikes by the marked constrast between the dark rocks and the red vegetation. Some amphibolite bodies in granitic terrain can also be detected by infrared photography and their contacts can be accurately drawn due to enchanced contrast of the two types of rock in the near infrared. Reflectance measurements made in the field for amphibolite and granite show that the granite is 25% to 50% more reflective in the near infrared than in the visible region. Further enhancement is due to less atmospheric scattering than in the visible region. Thermal infrared images of the Mill Creek, Oklahoma test site provided information on geologic faults and fracture systems not obtainable from photographs. Subtle stripes that cross outcrop and intervening soil areas and which probably record water distribution are also shown on infrared photographs.
Document ID
Document Type
Conference Paper
Offield, T. W.
(Geological Survey Denver, CO, United States)
Rowan, L. C.
(Geological Survey Denver, CO, United States)
Watson, R. D.
(Geological Survey Denver, CO, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1970
Publication Information
Publication: NASA. Manned Spacecraft Center 3d Ann. Earth Resources Program Rev., vol. 1
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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