16
107
10°
q
J
U
r
-
-
-
~
€
D
Nw
~s
&
y
8
2 gy
2 <
sos
S 6
Q
oN
er 8
(10
‘
~5
1"
0-4
Ss 88
OG
2
&°?
10°
=
1 3"
S
4
%
oo
8
10
3_1°
8
1]
4
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!
1.0
2
L
V5
MEV
Fig.
7.
Gamma-ray spectra of depth increments of old soil takan
The origin of each spectrum has
from the surface inch.
been arbitrarily separated from the preceding one by @
factor of ten to facilitate inspection of the figure.