o - Waste Isolation Pilot Plant

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(Powers; Octobe,28, 1997)
(Geology ofPiez,)mete,Holes)
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The Gatufia ranges from 19 to 31 ft thick in drillholes at the location of the surface
facilities (Figure 14).
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contour interval is 10ft
Figure 13
Thickness of Gatuna Formation
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I I WIPP Withdrawal Area
....,.... approximate erosional edge of Gatuna
The surface of the Santa Rosa was eroded by drainage 'to the
south and southwest before the Gatufia began to accumulate in this area. Thinner
Gatufia under the western area of the surface facilities is likely due to more recent
erosion and erosion before the Mescalero began to form.
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See Apprenclix B
Figure 13 for details