Tule Creek Granite Complex. Dominantly soda granite but includes areas of abundant granitic and quartz-feldspar porphyry dikes in mafic volcanic rocks and may include soda rhyolite. Texture commonly cataclastic, with mineral grains crushed and strained; rocks generally decomposed and poorly exposed. Areas generally characterized by unusually light-colored soil. [Intrudes Rattlesnake Creek terrane of Paleozoic and Triassic(?) age.] Age is Jurassic or older [Jurassic or Triassic].
Named from exposures in the upper reaches of Tule Creek in northeast corner of Pickett Peak quadrangle, Trinity Co., northeastern CA [= type locality].
Source: Publication; supplemental information (in brackets) from US geologic names lexicon (USGS Bull. 1520, p. 316).
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