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total depth: 2000 feet

r * 1 , gravel composed of volcanic, clay, and diatomite cobbles lacustrine sediments of the Truckee and Desert Peak(?) Formations no returns intensely hydrothermally altered clay, questionable origin(s) intensely altered andesites(?)

slightly to intensely altered basalts with lesser andesites, gravels, minor lacustrine clays, and water-laid tuffs(?)

rhyolites and rhyodacites with abundant crystals of quartz and biotite in a white, pink, or green soft groundmass altered andesitic flows with lesser basalt gray-brown, almost glassy-appearing rhyolite with common phenocrysts of biotite, feldspar, and lesser quartz and hornblende rhyolite, light gray to white with soft, somewhat altered matrix rhyolite with an almost glassy-appearing matrix intense alteration location: NE/4 NE/4 S21, T22N, R27E

Churchill County, Nevada started: July 9, 1976 completed: July 27, 1976

FIGURE 13. Lithologie log of Desert Peak stratigraphie test no. S.

temperature in °F

125 150 175 200 225 250

125 150 175 200 225 250

——— profile obtained by Phillips personnel

——1—— profile obtained by independent contractor and shown on plate 6 FIGURE 14. Temperature profiles of the upper part of Desert Peak ¡stratigraphie test no. 5.

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