GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
HA 730-J
Pennsylvanian 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
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Ground-water Quality
Figure 56 Map showing dissolved-solids concentrations in the Pennsylvanian
aquifer in central Michigan (61K)
downloadable tiff file J056.tif.gz (2MB
compressed)
Figure 57 Graph showing mineralization in water
from the Pennsylvanian aquifer (58K)
downloadable tiff file J057.tif.gz (1.6MB
compressed)
downloadable tiff file J056.tif.gz (2MB
compressed) 
downloadable tiff file J057.tif.gz (1.6MB
compressed)