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Marrs, R. W.

Zochol, F. W.

English

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TYPE 1 PROGRESS REPORT
CONTRACT: NAS 5-21818
MAY 1, 1973
FRANK ZOCHOL AND
R, W. MARRS
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ERTS-1 STUDY OF THE GEOLOGY OF THE ICE-FREE VALLEYS OF ANTARCTICA
Frank Zochol and Ronald W. Marrs
Department of Geology
University of Wyoming
Laramie, Wyoming 82070
May, 1973
Type I Progress Report (March-April, 1973)
Prepared for
GODDARD SPACE FLIGHT CENTER
GREENBELT, MARYLAND 20771
I
TECHN::' I
-."Report No. 2 . ovrnment Acc..on Tn C
4TT~iT. and Subtitle .
ERTS-1 Study of the Geology of the ice-free
valleys of Antarctica - Type I Progress Report
7. Author(s)
Frank Zochol and Ronald W. Marrs
9. Performing Organization Nome and Address
University of Wyoming
Department of Geology
Laramie, Wyoming 82070
12. Sponsoring Agency Nome and Address .
NASA/Goddard Space 'Flight Center
Greenbelt, Maryland
Technical Monitor, Arthur Fihelly
15. Supplementary Notes
L RLPORT STANDARD TITLE PAGE
3. eciplent's Coatalog No.
5. Report Dote
May 1, 1973
6. Performing Orgonizotion Code
8. Performing Orgaoniotlon Report No.
ERTS-ANT-1-73B
10. Work Unit No.
11. Contract or Graont No.
NAS 5-21818
13. Type of Report and Period Covered
Type 1 Report
March-April,-1973
14. Sponsoring. Agency Code
16. Abstract
During the March-April, 1973 report period the ERTS-1 Antarctic
investigation continued with-the major effort being to. complete the
compilation of the geologic base map. That map is now nearing com-
pletion and a primary test area was chosen in the Lake Vida. area where
the geologic map is most detailed. The image interpretations in this
area have been augmented by color-additive viewing and densitometric
contouring- "
, , , , ,, : .
. .. '
17. Key Words (S, lected by Author(s))
ERTS-1, Antarctic
Geologi.c base map
18. Distribution Statement
19. Security Clossif. (of this report) 20. Security Classif. (ofthis page)
Unclassified Unclassified
*For sale by the Clearinghouse for Federal Scientific and Technirnl intormntion, Springfield. Virginia 22151.
Figure 2. Technical Report Standard Title Page
II
21. No. of Pages 22. Price
I
L
I
L
I
SECOND BIMONTHLY
ERTS TYPE I REPORT
Frank Zochol
R. W. Marrs
OBJECTIVES OF THE CONTRACT
The objective of the University of Wyoming Antarctic study is to deter-
mine how well geologicifeatures of the ice-free valleys of Antarctica can be
recognized and mapped by interpretation of ERTS-I imagery.
WORK SUMMARY
During the March-April report period Mr. Zochol has continued his com-
pilation of a geologic base map for the Dry Valleys area of Antarctica. This
map is now nearing completion but various areas exhibit different degrees of
accuracy and detail reflecting the differences in the maps incorporated in the
compilation. Work used in assembling the compilation includes that of Allen
and Gibson (1962), Gunn and Warren (1962), McKelvey and Webb (1962), Blank
and others (1963), Hamilton (1965), Haskell and others (1965), Fikkan (1968),
Murphy (1971), and the field notes and maps of Scott B. Smithson of the Uni-
versity of Wyoming.
The area around Lake Vida in Victoria Valley was chosen a prime reference
site because the mapping in that area done by Fikkan (1968) offers the greatest
detail and accuracy. Also, the ERTS-1 imagery for,that area is of excellent
quality and shows the area relatively free of snow.
Mr. Zochol has begun mapping the Lake Vida area from interpretations of
the ERTS-1 imagery. He is employing standard photointerpretation techniques,
color-additive enhancement, and densitometry in this effort. The pronounced
contrast between the mafic and felsic rocks of the area (Houston, 1973) allows
for accurate distinction of these lithologies solely on the basis of image
2density. Mr. Zochol has recently been using the false-color isodensitracer
to objectively map areas of mafic and felsic rock outcrop.
SIGNIFICANT RESULTS
None for the March-April report period.
WORK SCHEDULE
Progress on the University of Wyoming ERTS-1 Antarctic program is in
keeping with the schedule of activities. Antarctic imagery of the ice-free
valleys test area was received in February, 1973, initial evaluations were
made, and a data analysis plan is now being assembled. We are now ready to
continue with Phase III of the program... Continuing Data Analysis.
PROBLEMS
No limiting problems have occurred during the March-April report period.
We continue to receive high-quality imagery of the test area which allows
stereo-viewing of the images and seasonal comparisons.
PERSONNEL
No changes have been made in personnel involved in the Antarctic inves-
tigation.
SUMMARY STATEMENT
The University of Wyoming Antarctic investigation is progressing on
schedule with no significant problems. Results to date are encouraging, and
it appears that the contract objectives will be realized.
3REFERENCES
Allen, A. D., and Gibson, G. W., 1962, Geologic investigations in Southern
Victoria Land, Antarctica: Part 6, Outline of the Geology of the Victoria
Valley region: New Zealand Jour. Geol. & Geophys., v. 5, no. 2, p. 234-242.
Blank, H. Richard and others, 1963, Geology of the Koettlitz-Blue Glacier
region, Southern Victoria Land, Antarctica: Roy. Soc. New Zealand Trans.,
vol. 2, no. 5, p. 79-100.
Fikkan, Philip R., 1968, Granitic rocks in the Dry Valleys region of South
Victoria Land, Antarctica: Unpublished Univ. of Wyo. Thesis.
Gunn, Bernard M., and Warren, G., 1962, Geology of Victoria Land between the
Mawson and Mulock glaciers, Antarctica: New Zealand Geol. Survey Bull. 71,
157 PP.
Hamilton, Warren, 1965, Diabase sheets of the Taylor Glacier region, Victoria Land,
Antarctica: U. S. Geol. Survey Prof. Paper 456B, 71 pp.
Haskell, T. R., Kennett, J. P., and others, 1965, The geology of the middle
and lower Taylor Valley of South Victoria Land, Antarctica: Trans. R.
Soc. New Zealand, vol. 2, no. 12, p. 169-186.
Houston, R. S., 1973, ERTS-i study of the geology of the ice-free valleys of
Antarctica -- Type I progress report: Univ. of Wyo., Laramie,Dept. of
Geology Report.
McKelvey, B. C., and Webb, P. N., 1962, Geological investigations in Southern
Victoria Land, Antarctica: Part 3, Geology of Wright Valley: New Zealand
Jour. Geol. & Geophys., vol. 5, no. 1, p. 142-162.
Murphy, Donald, The petrology and deformational history of the basement complex
(Precambrian), Wright Valley, Antarctica, with special reference to the
origin of the augen gneiss: Unpublished Univ. of Wyo. Thesis.


ERTS-1 study of the geology of the ice-free valleys of Antarctica

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