Hydrologic significance of the lithofacies of the Sparta Sand in Arkansas, Louisiana, Mississippi, and Texas

Abstract

Permeability and transmissibility in relation to geologic factors-______________________________ Recharge and discharge.________________________ Regional flow__________________________________ Chemical quality of water and relations to geologic and hydrologic factors______________________________ Chemical provinces-______________ _____________ Dissolved solids._______________________________ Extent of flushing of the Sparta Sand _________________ Conclusions.

Geohydrologic units of the Gulf Coastal Plain in Arkansas

“…In some areas the delineation of the salinity of the water was derived only from electric log interpretation. Lines of equal dissolved-solids concentrations were also partly derived from Gushing (1966) and Payne (1968Payne ( , 1972Payne ( , 1975. The plotted lines represent the minimum concentration that can be expected to occur in a vertical profile in the geohydrologic unit.…”

“…In southern Arkansas the Sparta Sand is a multi-unit aquifer usually with several sand units and different dissolved-solids concentrations (Payne, 1968). For example, at one location northwest of Hamburg (Ashley County), Payne shows a minimum dissolved-solids concentration of 1,000 mg/L and a maximum concentration of 10,000 mg/L.…”

“…Hosman and others (1968, p. D18-20) and Payne (1968) provide a more detailed description of the lithologic and hydrologic characteristics of the Sparta Sand.…”

“…Earlier publications (Gushing and others, 1964;Boswell and others, 1965;Hosman and others, 1968;Payne, 1968Payne, , 1972Payne, , 1975 included similar data and maps but were regional in scope and therefore were less detailed or did not include all of the Coastal Plain in Arkansas.…”

Potentiometric surface of the Sparta aquifer in eastern and south-central Arkansas and north-central Louisiana, and the Memphis Aquifer in east-central Arkansas, October 1996-July 1997

“…The western boundary is defined as the western extent of the outcrop and subcrop (Hosman, 1982) of the Sparta Sand and the Memphis Sand. In Louisiana, the area is bounded on the south and east by the approximate downdip limit of freshwater (Payne, 1968) and the western boundary is defined by the western limit of the Sparta aquifer.…”