Accession Number : AD0689408

Title :   PHOTO-INTERPRETATION STUDIES OF DESERT BASINS IN NORTHERN AFRICA.

Descriptive Note : Final rept. (Part 1), Mar 63-Jul 68,

Corporate Author : MASSACHUSETTS UNIV AMHERST DEPT OF GEOLOGY

Personal Author(s) : Smith,H. T. U.

Report Date : JUN 1969

Pagination or Media Count : 106

Abstract : The study appraises the feasibility of photogeologic methods for estimating nature of surface materials, moisture conditions, relief, and other characteristics of desert basin floors in the Saharan region, using medium-scale Tri-Metrogon photography, in black-and-white. A frame of reference is provided by studies on playas in western U. S., by reports on widely-scattered field observations on African basins, and by available literature on regional geology and geography. Interpretation is based partly on direct evidence from what is seen on photos, and partly on indirect evidence deduced from the geologic context. Results are of a reconnaissance nature, informative as to general characteristics, but more limited with respect to specifics because of the scale, type, and quality of the photos. For more definitive interpretation, supplementary sources of data are required. One general conclusion, however, is that the dry, firm type of playa surface well known in western U. S. is uncommon in the Sahara, and has been recognized only in western part of that region. (Author)

Descriptors :   (*DESERTS, PHOTOGEOLOGY), (*PHOTOGEOLOGY, NORTH AFRICA), TERRAIN, PHOTOGRAPHY, PHOTOINTERPRETATION, SURFACE PROPERTIES, LAKES, DETECTORS, WIND, SAND, DEPOSITS, PLAYAS, CLIMATE, AERIAL PHOTOGRAPHS, AERIAL PHOTOGRAPHY, LIBYA

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE