Latitude: 43°19'22"N
Longitude: 122°11'37"W
Collecting in andesite boulders along dam spillway.
The boulders along the spillway came from the excavation of the spillway trench itself. Doug Merson's 2003 photo on the Lemolo Lake page shows the lava (andesite) flow in the background from where the boulders were derived. Most of the interesting mineralogy occurs in the bottom contact zone (roughly 2cm) of that flow.
There are other boulders there, but they are composed of a lighter colored andesite versus the dark gray with a reddish, rubbly contact zone.
Mineral List
12 entries listed. 12 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please
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References
Mineralogical Record: 16(2).
Howard, Donald G. (2004), Micro Probe, Northwest Micro Mineral Study Group, Vol. IX, No. 9, page 3.
Micro Probe, Northwest Micro Mineral Study Group, Fall 2007, Volume X, No. 6.
Howard, Donald G. (2010), International Micromounters Journal: 17(2): 6.
Mineral and Locality Search
