|Quadrangle map, 1:250,000-scale||AR|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Location at head of Riley Creek 3000 ft. (1 km) northeast of Shields Mountain in the Cosmos Hills, in T. 19 N., R. 9 E., Kateel River Meridian. Shown as locality 28 in Mayfield and Grybeck (1978). Location accurate to within 1000 ft. (300 m).|
Geologic descriptionAlluvial placer 200 m long, less than 10 m wide and about 2 m thick in high, steep and dry tributary to Riley Creek. Much of Au in bedrock crevices; also visible free Au is in quartz veins in drainage basin. Basin contains colluvium composed of slate, limestone and quartz gravel, and a few large greenstone boulders, up to 2 ft (0.6 m) in diameter, probably of glaciofluvial origin (Fritts, 1970, p. 58).
|Geologic map unit||(-156.899741897684, 67.0384532750146)|
|Mineral deposit model||Placer (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Workings or exploration||Surface.|
|Indication of production||Yes; small|
Additional commentsArea mined was a high, steep, and dry tributary of Riley Creek (Smith and Mertie, 1930, p. 336).
Fritts, C.E., 1970, Geology and geochemistry of the Cosmos Hills, Ambler River and Shungnak River quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 39, 63 p., 4 sheets, scale 1:63,360.
|Reporters||K.R. Leonard (USGS), R.L. Elliott (USGS) J.M. Schmidt (USGS), S.W. Nelson (USGS retired)|
|Last report date||4/30/1997|