These are the geological single record data listings for the Helena quadrangle, as part of its parent document Mississippi and Florida Airborne Survey, Final Report: Helena Quadrangle, Arkansas, Mississippi and Tennessee.

These are the geological single data record listings for the Helena quadrangle, as part of its parent document Mississippi and Florida Airborne Survey, Final Report: Helena Quadrangle, Arkansas, Mississippi and Tennessee.

These are the geological averaged record data listings for the Tupelo quadrangle, as part of its parent document Mississippi and Florida Airborne Survey, Final Report: Tupelo Quadrangle, Mississippi, and Alabama, and Tennessee.

These are the geological single record data listings for the Tupelo quadrangle, as part of its parent document Mississippi and Florida Airborne Survey, Final Report: Tupelo Quadrangle, Mississippi, and Alabama, and Tennessee

Summary: "This report provides data on the alluvial aquifer of the Lower Mississippi Valley in the area between Cape Girardeau, Missouri, and Port Gibson, Mississippi. Maps are presented of the Tertiary surface on which the alluvial aquifer rests as well as the geology of this surface and the areas where hydrologic recharge to the alluvial aquifer may occur. A set of piezometric-surface maps, together with hydrographs of observation wells, river stages, precipitation rates, and data on the hydrologic properties of the alluvium, makes it possible to calculate changes which take place in the aquifer. Further data are presented on the chemical quality of groundwater. The relevance of these data to engineering problems is discussed" (p. ix).

Final report discussing a facility built to test californium-252 in research on moisture, density, and other properties of soil and rock in relation to engineering characteristics.

Final report documenting a high-sensitivity airborne gamma ray and magnetic survey of the Helena quadrangle including an analysis of the geology and interpretation of geophysical data.

Final report documenting a high-sensitivity airborne gamma ray and magnetic survey of the Tupelo quadrangle including an analysis of the geology and interpretation of geophysical data.