68 LYNN C. HOWELL 
faulted region. The positions of the supposed faults are shown beneath 
the curves. It is readily seen that any sort of correlation is difficult. 
The distribution seems erratic, as in the case of the previous curve 
for a supposedly non-faulted region. This lack of correlation between 
faults and radioactive “highs” is in agreement with the work of Bot- 
set and Weaver (9), who also worked in Texas. Along a line in one 
region, Clark and Botset (10) found a rather close correlation between 
the radon and the heavy mineral content of the soil. 
/sec 
RATE OF CASCHARSE, ow 
A s 
! 2 3 4 s 6 
i, Ae A MRS Tas: 
|sec 
e 
a 
RATE OF DISCHARGE, DIV 
8 
Fic. 3.—Line surveys in faulted area. 
Although it is possible that the methods of radioactivity may be 
of some value in the study of local soil variations, at the present stage 
of our knowledge there seems to be little application for these methods 
in petroleum geophysics, at least in the Gulf Coast region. 
In the work reported herewith the observations in the field were 
taken by Bruce Hill under the direction of L. W. Blau. 
BIBLIOGRAPHY 
1. Harold Jeffreys, The Earth, Macmillan (1929), p. 144. 
2. Richard Ambronn, Elements of Geophysics, translated by Margaret C. Cobb, 
McGraw-Hill (1928), p. 127. 
3. E. Link and R. Schober, Gas and Wasserfach, Vol. 69 (1926), p. 225. 
4. Ferdinand Mueller, Radioaktivitaétsmessungen als geophysikalische Aufschluss- 
methode, Zeits. f. Geophysik, Vol. 3 (1927), p. 330. 
5. L. N. Bogojavlensky and A. A. Lomakin, “Experiments on Highly Penetrating 
Radiations from the Earth,” U.S. Bur. Mines Cir. 6072 (1928). 
6. L. N. Bogojavlensky, ‘‘Radiometric Exploration of Oil Deposits,” U. S. Bur. 
Mines Cir. 6072 (1928). 
7. J. Elster and H. Geitel, PA) stk. Zetts., Vol. 3 (1902), p. 574. 
8. Richard Ambronn, Elements of Geophysics, translated by Margaret C. Cobb, 
McGraw-Hill (1928), p. 118. 
9. Holbrook G. Botset and Paul Weaver, Physics, Vol. 2 (1932), p. 376. 
10. R. W. Clark and Holbrook G. Botset, Bull. Amer. Assoc. Petrol. Geol., Vol. 16, 
No. 12 (December, 1932), pp. 1349-56. 
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