Sample: 74-ALe-63

Sample ID:	74-ALe-63 ^[1]
Station ID:	74-ALe-63
AT Num:
Volcano:	Sanford
Possible source:
Eruption:
Collector:	Unknown, Unknown
Date sampled:	1974-00-00
Sample type 1:	Lava
Color:
Final unit:
Text Description:	Mount Sanford dikes (Pleistocene). Chiefly dikes of andesitic composition that have probably widely diverse ages; associated with main Sanford center, three subsidiary centers, and smaller satellitic vents. Not all dikes shown on map sheet were examined in the field; those that were visited and sampled are mostly gray, porphyritic two-pyroxene andesite and olivine andesite, mineralogically similar to host Sanford lava flows (Qsl). * * * Whole-rock K-Ar age of 0.78+/-0.08 Ma was determined on sample 74-ALe-63.
Sample Location:

References Cited

[1] Geologic map of the Gulkana A-1 Quadrangle, south-central Alaska, 1994

Richter, D. H., Duffield, W. A., Sawyer, D. A., Schmoll, H. R., and Ratte, J. C., 1994, Geologic map of the Gulkana A-1 Quadrangle, south-central Alaska: U.S. Geological Survey Geological Quadrangle Map GQ 1728, unpaged, 1 sheet, scale 1:63,360.