Introduction and National Summary


There are two different files for each illustration

A 72 ppi GIF file, suitable for screen viewing is accessed through the thumbnail image.
An eps file, suitable for downloading to be printed or edited is accessed through the "eps file" link. Most files are Adobe Illustrator 6.0, exceptions are noted. 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 eps files as ascii, not binary.

Nationwide map of principal aquifers

Figure 4a Map showing the distribution of the principal aquifers of the contiguous United States. (440K)
editable eps file A004_us.eps.gz (2.3MB compressed)

Figure 4b Map showing the distribution of the principal aquifers of Hawaii, Alaska, Puerto Rico and the Virgin Islands. (56K)
editable eps file A004_b.eps.gz (552KB compressed)

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