THERMAL IR FOR GEOLOGY

THERMAL INFRARED (8 TO 13 MICROMETERS) IMAGERY WAS OBTAINED IN THE CALIENTE AND TEMBLOR RANGES AND CARRIZO PLAIN, SOUTHERN CALIFORNIA, IN THE PREDAWN AND POSTSUNRISE HOURS OF JUNE 18, 1965. FIELD OBSERVATIONS, MEASUREMENTS OF MOISTURE AND SPECIFIC GRAVITY OF THE REGOLITH, AND RADIATION TEMPERATURES, AND COMPARISON WITH GEOLOGIC MAPS AND AERIAL PHOTOGRAPHS LEAD TO THE FOLLOWING CONCLUSIONS: (1) THE SPECIFIC GRAVITIES OF SURFICIAL MATERIALS (USUALLY NOT BEDROCK) INFLUENCE TONAL DENSITIES IN THE PRE-DAWN IMAGERY. HENCE AREAS UNDERLAIN BY SANDY ALLUVIUM, SANDSTONE, OR CONGLOMERATE (HIGH SPECIFIC GRAVITY) TEND TO BE BRIGHTER IN PRE-DAWN IMAGERY THAN AREAS UNDERLAIN BY SHALE, MUDSTONE, OR DIATOMITE (LOW SPECIFIC GRAVITY). (2) GEOLOGIC INTERPRETATION OF TONAL DENSITY PATTERNS IS COMPLICATED BY TOPOGRAPHIC, ATMOSPHERIC, AND VEGETATIVE EFFECTS ON PREDAWN RADIATION. (3) GEOLOGIC FEATURES SUCH AS OUTCROP PATTERNS AND SOME FAULTS ARE RECOGNIZABLE IN THE INFRARED IMAGERY AS WELL AS IN AERIAL PHOTOGRAPHS. (4) POST SUNRISE IMAGERY IS DOMINATED BY THE PREFERENTIAL WARMING OF SLOPES EXPOSED TO THE EARLY MORNING SUN AND RESEMBLES LOW-SUN-ANGLE PHOTOGRAPHS. /AUTHOR/

  • Supplemental Notes:
    • Vol 37, No1, PP 43-52, 6 FIG, 1 TAB, 7 REF
  • Authors:
    • Wolfe, E W
  • Publication Date: 1971-1

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Filing Info

  • Accession Number: 00202886
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 25 1971 12:00AM