GROUND WATER ATLAS of the UNITED STATES
Idaho, Oregon, Washington
HA 730-H

Pliocene and younger basaltic-rock aquifers

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.

Figure 26 Map showing location of Pliocene and younger basaltic-rock aquifers (256K)
downloadable tiff file H026.tif.gz (1.9MB compressed)

Figure 27 Cross section showing lava flows (280K)
downloadable tiff file H027.tif.gz (1.8MB compressed)

Figure 28 Photograph of eastern Snake River Plain (252K)
downloadable tiff file H028.tif.gz (1.9MB compressed)

Figure 29 Photograph showing contrast between land barren by basaltic lava flows vs. cultivated land on layer of thick soil (184K)
downloadable tiff file H029.tif.gz (1.3MB compressed)

Figure 30 Photograph of pillow basalt (284K)
downloadable tiff file H030.tif.gz (2.1MB compressed)

Figure 31 Photograph of basaltic rock core samples (148K)
downloadable tiff file H031.tif.gz (1.1MB compressed)

Figure 32 Photograph of basaltic rock showing layers of permeability (200K)
downloadable tiff file H032.tif.gz (1.7MB compressed)

Figure 33 Diagram of wells drilled into basalt (144K)
downloadable tiff file H033.tif.gz (244K compressed)

Figure 34 Photograph showing layers of fine-grained, unconsolidated deposits between interflow zones (480K)
downloadable tiff file H034.tif.gz (1.9MB compressed)

Figure 35 Diagram showing formation of interflow zones (176K)
downloadable tiff file H035.tif.gz (1.2MB compressed)

Figure 36 Diagram showing wells completed in Pliocene and younger basaltic-rock aquifers (168K)
downloadable tiff file H036.tif.gz (1.1MB compressed)

Figure 37 Chart showing effect of atmospheric pressure changes on well-water levels (140K)
downloadable tiff file H037.tif.gz (1MB compressed)



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