ate ttetenn
16
103
10°
~
&
>
Nw
~
»
2
ne
xs
SG
G
3
os
G
5
Q
ow
Q
9
2
S
so
NX
9
Q
98
~
~
2
&
S
s
%
§
@ Juv
YQ
1.
L
0.5
1.0
1.5
MEV
Fig. 7.
—
arenes
:
$
Gamma-ray spectra of depth increments of old soil taken
The origin of each spectrum has
from the surface inch.
been arbitrarily separated from the preceding one by a
factor of ten to facilitate inspection of the figure.