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PACIFIC SCIENCE, Vol. XXII, October 1968 
favors complete leaching and rapid desilication 
of the weathering matrix. 
The islands offer an excellent site also for the 
study of the effect of age on soil development. 
Examples of the transition of one type of soil 
group to a soil group of greater stability are 
described. 
The interaction between the influence of 
parent material and of weather and rainfall is 
being studied. The first phase of this prelim- 
inary study is to determine why the products 
of rock weathering can range from kaolin to 
ferruginous bauxite on a single lava flow, with 
rainfall being the chief variable. The second 
phase is a study of the effect of the nature of 
the first product of rock weathering on sub- 
sequent soil formation. Soils of three great 
soil groups are developed on this parent mate- 
rial, namely, Aluminous Ferruginous Latosol, 
Ferruginous Humic Latosol, and Low Humic 
Latosol. 
REFERENCES 
Cline, M. G., et al. 1955. Soil Survey of the 
Territory of Hawaii. U.S. Dept, of Agr. Soil 
Survey Series 1939, No. 25. 
Mohr, E. C. J. 1944. The Soils of the Equa- 
torial Regions. Edwards Bros., Ann Arbor, 
Michigan. 766 pp. 
Sherman, G. Donald. 1949. Factors influen- 
cing the development of lateritic and laterite 
soils in the Hawaiian Islands. Pacific Sci. 
3:307-314. 
1952. The genesis and morphology of 
the alumina-rich laterite clays. In: Problems of 
Clay and Laterite Genesis. A. I. M. E. New 
York Symposium, 1951, pp. 154-161. 
Tamura, T., M. L. Jackson, and G. Donald 
Sherman. 1955. Mineral content of a lato- 
solic brown forest and a humic ferruginous 
latosol of Hawaii. Proc. Soil Sci. Soc. Am. 
19:435-439. 
Tanada, T. 1951. Certain properties of the in- 
organic colloidal fraction of the Hawaiian 
Soils. J. Soil Sci. 2:83-96. 
