AN AIRPHOTO STUDY OF THE TRIASSIC AREA IN ALBEMARLE COUNTY, VIRGINIA

THE ADVANTAGES ARE PRESENTED OF AN AIRPHOTO STUDY TO DETERMINE A RELIABLE BOUNDARY FOR THE TRIASSIC BASIN AND TO DIFFERENTIATE THE SOILS IN THE BASIN AS A FUNCTION OF THEIR PARENT MATERIALS: SANDSTONES AND SHALES. THE AIRPHOTO PATTERN CLEARLY SHOWS THE MAIN OUTCROPS SINCE THE SANDSTONE WILL WEATHER INTO A SOIL WHICH, EVEN IF PLASTIC, IS LESS FINE-GRAINED, THEREFORE, SOMEWHAT BETTER DRAINED THAN THE SOIL DERIVED FROM SHALES. THE SHALES AND SANDSTONE WEATHER AT ABOUT THE SAME RATE. A ROAD PERFORMANCE SURVEY WAS MADE IN CONNECTION WITH THE INVESTIGATION. A COST SURVEY COVERING A NINE-YEAR PERIOD SHOWED THAT THE AVERAGE MAINTENANCE COST OF UNPAVED ROADS WAS HIGHER IN THE TRIASSIC BASIN THAN FOR EQUIVALENT ROUTES IN SURROUNDING PRE-CAMBRIAN AREA. THE IMPORTANCE IS CONFIRMED OF A THOROUGH KNOWLEDGE OF THE TRIASSIC BASINS FOR HIGHWAY ENGINEERING AND THE AIR-PHOTO SURVEY USED IS OF DEFINITE ADVANTAGE.

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  • Supplemental Notes:
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  • Authors:
    • Melville, P L
  • Conference:
  • Publication Date: 1948

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 30-47
  • Monograph Title: The appraisal of terrain conditions for highway engineering purposes
  • Serial:

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Filing Info

  • Accession Number: 00202690
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 12 1994 12:00AM