should be corrected on revised maps, since the ERTS image shows 
that the Rio de Mauri no longer exists as a tributary. 
CONCLUSION 
The advanced remote sensing technology from space has been 
applied to practical problems and to research in geoscience. 
ERTS imagery provides a regional framework for studies of the 
lithological and structural character of different bedrock 
complexes. Although small details cannot be detected on ERTS 
imagery, the boundaries of areas of distinct lithological 
character and significant aerial occurrence can be delineated 
accurately. 
This valuable information should be applied not only to 
scientific study, but also to all levels of education, in 
order to appreciate the greatness and mystery of our Earth. 
REFERENCES 
Gregory, A.F. and Moore, H.D. 
1973: Recent Advances in Geologic Applications of Remote 
Sensing from Space. 
The 24th Congress of the International Astronautical 
Federation, Baku, U.S.S.R., Oct. 7-13, 1973. 
Proceedings in press as Astronautical Research, 
1973. 
Lowman, P.D., Jr. 
1969: Apollo-9 Multispectral Photography: Geologic 
Analysis. 
X-644-69-423, Goddard Space Flight Center, 
Greenbelt, Md. 
Mercanti, Enrico P. (editor). 
1973: Teaching us a New Way to See. 
NASA NPD 800-2A, September, 1973. 
NASA. 
1973: Proceedings of the Symposium on Significant Results 
from the ERTS-1. 
Vol. I. NASA SP-327, U.S. Government Printing 
Office, Washington, D.C. 20402. 
Vol. II (X-650-73-127) and III (X-650-73-155). 
Code 430, NASA, GSFC, Greenbelt, Md. 20771.