Shown in geologic sketch map of western half of Markleeville 15-min quadrangle, Alpine Co., CA, in area around Burnside Lake. [Age not stated.]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Mapped with other granite and adamellite units as Jurassic and Cretaceous age. Name credited to Parker (1959, unpub. PhD thesis).
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Shown on map of Freel and Dardanelles Further Planning Area, Alpine and El Dorado Counties, CA. Consists of light-pinkish-gray porphyritic biotite granite. Intrudes Echo Lake Granodiorite. Age given as Late Cretaceous.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
K-Ar determination on biotite from Burnside Lake Adamellite yielded 86.5 +/-0.5 Ma. Specimen collected at 38 deg 45' 28"N, 119 deg 58' 06"W; location shown on map. [Based on U.S. Geologic Time Chart, 1986, age is Late Cretaceous]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
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