USGS Data Series 1090: Hydrogeologic Framework for Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States

Interactive Maps

Figure 1. Distribution of source data from the Quaternary Atlas (Fullerton and Richmond, variously dated) and Surficial Materials Map (Soller and others, 2009) coverages used for the Glacial Environment and Surficial Sediments geodatabase for the glaciated conterminous United States.

Figure 2. Glacial Environment and Surficial Sediments (GESS) geodatabase map units (GESS_MU attribute) in the glaciated conterminous United States.

Figure 3. Textural classification of Glacial Environment and Surficial Sediments geodatabase map units in the glaciated conterminous United States.

Figure 4. Generalized bedrock lithology (modified from the Integrated Geologic Map Databases for the United States) and overlying Glacial Environment and Surficial Sediments geodatabase coarse-grained, stratified surficial sediments in the glaciated conterminous United States.

Figure 8. Hydrogeologic terranes and the thickness and character of glacial sediments in the glaciated conterminous United States.

Figure 9A. Hydrogeologic terranes and the maximum glacial advance in the glaciated conterminous United States.

Figure 10A. Terranes 1A and 4A in the northeastern glaciated conterminous United States.

Figure 10B. Terranes 1B, 2A, and 3A in western Ohio, Michigan, Indiana, Illinois, eastern Wisconsin, and a small area of northern Kentucky in the glaciated conterminous United States.

Figure 10C. Terranes 1C, 2C, 2D, 3C, and 4B in Iowa, southern Minnesota, southeastern South Dakota, northern Missouri, eastern Nebraska and Kansas, and a small area of western Illinois in the glaciated conterminous United States.

Figure 10D. Terranes 1D, 1E, 2B, and 3B in Minnesota, Wisconsin, upper Michigan, northern Illinois, and eastern North and South Dakota in the glaciated conterminous United States.

Figure 10E. Terranes 1F and 2E in North and South Dakota and in eastern Montana in the glaciated conterminous United States.

Figure 10F. Terrane 1G in Washington, Idaho, and western Montana in the glaciated conterminous United States.

Figure 12. Density of lithologic logs aggregated on a 5-kilometer grid in the glaciated conterminous United States.