GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
HA 730-J
Silurian-Devonian aquifer
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 Quality
Figure 86 Map showing dissolved solids concentrations in water
from the Silurian-Devonian aquifer (373K)
downloadable tiff file J086.tif.gz (3.2MB
compressed)
Figure 87 Map showing sulfate concentrations in
water from the Silurian-Devonian aquifer in Iowa (228K)
downloadable tiff file J087.tif.gz (2MB
compressed)
Figure 88 Graph showing chemical constituents in
water from the Silurian-Devonian aquifer in Michigan (191K)
downloadable tiff file J088.tif.gz (1.7MB
compressed)
Figure 89 Map showing relative amounts of dissolved-solids
in water from the Silurian-Devonian aquifer in Michigan (333K)
downloadable tiff file J089.tif.gz (3.3MB
compressed)
downloadable tiff file J086.tif.gz (3.2MB
compressed) 
downloadable tiff file J087.tif.gz (2MB
compressed) 
downloadable tiff file J088.tif.gz (1.7MB
compressed) 
downloadable tiff file J089.tif.gz (3.3MB
compressed)