Summary of Ground-Water Hydrology of the Cambrian-Ordovician Aquifer System inthe Northern Midwest, United States. Regional Aquifer-System Analysis-Northern Midwest

摘要

The Cambrian-Ordovician aquifer system is composed of six hydrogeologic units,which are, in descending order, the Maquoketa confining unit, St. Peter-Prairie du Chien-Jordan aquifer, St. Lawrence-Franconia confining unit, Ironton-Galesville aquifer, Eau Claire confining unit, and Mount Simon aquifer. The purpose of the report is to summarize the findings of the regional study of the Cambrian-Ordovician aquifer system. The report includes discussions of the hydrogeology, geochemistry, and development of ground water in the system and suggestions for future studies.