Post-Mazama Natrargids in Dixie Valley, Nevada1
- E. B. Alexander and
- W. D. Nettleton2
Some of the youngest Natrargids in central Nevada are in basin-fill containing volcanic ash. South of the salt flat in Dixie Valley they are associated with Torrifluvents and Torriorthents in a continental climate with mean temperatures about 12 to 14°C and mean annual precipitation between 10 and 15 cm. Since there are lenses of Mazama ash below the natric horizons in some of these Natrargids, they are know to be < 6,600 radiocarbon years old.
A representative Typic Natargid in silty post-Mazama basin-fill sediments is described. Illuviation is confirmed by clay skins in the natric horizon. The present precipitation is adequate to account for its development.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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