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TABLE OF CONTENTS
Page
INTRODUCTION
L
METHODS
OF COLLECTION AND MEASUREMENT
4
RESULTS
AND DISCUSSION
7
Depth Gradient of Gamma Spectra
12
Old Soil
12
Litter and Guano
14
Young Soil
18
Depth Gradient of sr?°
21
RADIOAUTOGRAPHS
25
Young Soil
25
Undisturbed
25
Eroded
25
Old Soil
28
Horizontal Movement
28
Buried Organic Layers
30
Roots
30
Pumice
31
CONCLUSIONS
33
SUMMARY
35
REFERENCES
37
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