GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
HA 730-J

Cambrian-Ordovician aquifer system

There are two different files for each illustration

A 90 ppi JPEG file, suitable for screen viewing is accessed through the thumbnail image

A tiff file is accessed through the "tiff file" link. All files are Adobe Photoshop. These files have been compressed with GNU's gzip utility. If your web browser defaults to a screen display of the file, turn on the "Load to local disk" option before downloading. Download and process these tiff files as ascii, not binary.

Ground-water Flow

Figure 116 Map showing horizontal ground-water movement in St. Peter-Prairie du Chien-Jordan aquifer (513K)
downloadable tiff file J116.tif.gz (3.6MB compressed)


Figure 117 Map showing vertical ground-water movement in southeastern Minnesota (433K)
downloadable tiff file J117.tif.gz (3.8MB compressed)


Table 6 Table showing transmissivity values in the St. Peter-Prairie du Chien-Jordan aquifer (211K)
downloadable tiff file Jtab06.tif.gz (2.1MB compressed)


Figure 118 Map showing transmissivity of the St. Peter-Prairie du Chien-Jordan aquifer in Iowa (200K)
downloadable tiff file J118.tif.gz (1.6MB compressed)


Figure 119 Diagram showing how transmissivity and confinement affect aquifer water levels (433K)
downloadable tiff file J119.tif.gz (3.8MB compressed)

Figure 120 Diagram showing estimates of principal inflow and outflow of water in the St. Peter-Prairie du Chien-Jordan aquifer (138K)
downloadable tiff file J120.tif.gz (1.2MB compressed)


Figure 121 Map showing the predevelopment potentiometric surface of the St. Peter-Prairie du Chien-Jordan aquifer in Iowa (238K)
downloadable tiff file J121.tif.gz (1.9MB compressed)

Figure 122 Map showing the 1974-1975 potentiometric surface of the St. Peter-Prairie du Chien-Jordan aquifer in Iowa (222K)
downloadable tiff file J122.tif.gz (1.6MB compressed)


Figure 123 Map showing the decline of the potentiometric surface of the St. Peter-Prairie du Chien-Jordan aquifer in Iowa (228K)
downloadable tiff file J123.tif.gz (2MB compressed)

Figure 124 Hydrographs of wells completed in the St. Peter-Prairie du Chien-Jordan aquifer in Iowa (191K)
downloadable tiff file J108.tif.gz (1.5MB compressed)


Figure 125 Map showing the water level decline in the Cambrian-Ordovician aquifer system in the Milwaukee-Chicago area (277K)
downloadable tiff file J125.tif.gz (2.4MB compressed)

Figure 126 Map showing potentiometric surface of the Ironton-Galesville aquifer in 1980 (652K)
downloadable tiff file J126.tif.gz (5.1MB compressed)

Table 7 Table showing transmissivity values in several Cambrian-Ordovician aquifers (63K)
downloadable tiff file Jtab07.tif.gz (236K compressed)


Table 8 Table showing comparison of water-level altitudes in several Cambrian-Ordovician aquifers (68K)
downloadable tiff file Jtab08.tif.gz (195K compressed)

Figure 127 Map showing potentiometric surfaces of the Mount Simon aquifer for 1980 (263K)
downloadable tiff file J127.tif.gz (4.1MB compressed)


Table 9 Table showing transmissivity values for the Mount Simon aquifer (55K)
downloadable tiff file Jtab09.tif.gz (198K compressed)

Return to Cambrian-Ordovician aquifer system text
Return to HA 730-J table of contents
Return to Ground Water Atlas home page