Record Display for the EPA National Library Catalog

RECORD NUMBER: 5 OF 5

OLS Field Name OLS Field Data
Main Title Studies of Saprolite and its Relation to the Migration and Occurrence of Groundwater in Crystalline Rocks.
Author Howard, II, J. Hatten ; Hurs, V. J. ;
CORP Author Georgia Univ., Athens. Dept. of Geology.
Year Published 1972
Report Number DI-14-01-0001-1488; OWRR-B-010-GA; 01955,; B-010-GA(1)
Stock Number PB-213 184
Additional Subjects ( Ground water recharge ; Hardpan) ; ( Hardpan ; Permeability) ; ( Crystalline rocks ; Weathering) ; Metamorphic rocks ; Subsurface drainage ; Subsoil ; Fluid infiltration ; Aquifers ; Georgia ; Saprolite ; Decomposed rock ; Georgia piedmont
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-213 184 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 22p
Abstract
Geochemical, mineralogical, and textural studies of weathering mantles of crystalline rocks of the Georgia Piedmont show that a low-permeability horizon, which develops during the weathering of some rock types and which impedes infiltration of water from the surface, associates with the accumulation of kaolinite and oxides of iron, aluminum, and silicon. Three types of hardpan were found, but only one is extensive in its impedance of water infiltration. This is a dense layer, often several feet thick and composed of accumulations of hematite, kaolinite, and probably silica, which form in the weathering mantle of granitic and gneissic rocks. It may be possible to disrupt this low-permeability layer by application of organic reducing agents, thus increasing water infiltration for recharge of underlying aquifers. (Author)