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Geohydrology and water quality of Cenozoic and Mesozoic units in southeast Missouri

Hydrologic Atlas 719

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Abstract

The U.S. Geological Survey is conducting a regional water-resources investigation of the Gulf Coast Regional Aquifer System, which includes the Mississippi embayment aquifer system in the southeast lowlands of Missouri (Grubb, 1986). The regional study will describe and evaluate the significant aquifer systems of Tertiary and younger age in parts of 10 States (Grubb, 1984). Paleozoic, Mesozoic, and Cenozoic geologic units in southeast Missouri have been described and mapped to define the aquifers of the area (Mesko, in press). This report describes aquifers in unconsolidated sediments of Cenozoic and Mesozoic age of southeast Missouri and presents geohydrologic and water-quality information collected during the study.
The southeast lowlands of Missouri is underlain by a multiaquifer ground-water system consisting of unconsolidated and consolidated sediment (table 1, sheet 2). Unconsolidated aquifers, from youngest to oldest, are the Mississippi River Valley alluvial aquifer, Claiborne and Wilcox aquifers (Cenozoic age), and the McNairy aquifer (Mesozoic age). Numerous geologic formations that primarily consist of sand and clay comprise these units. Consolidated aquifers underlying the region are the Ozark and St. Francois aquifers (Paleozoic age). These aquifers in Paleozoic rocks occur at greater depth and produce saline quality water (except near the margin of the embayment), and are not discussed in detail in this report.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geohydrology and water quality of Cenozoic and Mesozoic units in southeast Missouri
Series title:
Hydrologic Atlas
Series number:
719
Edition:
-
Year Published:
1990
Language:
ENGLISH
Description:
23 maps on 2 sheets :col. ;sheets 76 x 99 cm., folded in envelope 30 x 24 cm.
Scale:
1000000
Online Only (Y/N):
N
Additional Online Files (Y/N):
N