Shoo Fly Complex, marine sedimentary rocks
Shoo Fly Complex, marine sedimentary rocks
Devonian to Silurian
Mapped south of Highway 50, in central and southern Sierra Nevada. A southward extension of the Antoine Canyon Formation (Harwood, 1992). Chiefly quartzite and schist (metapelite), with lesser marble, calc-silicate rock, and amphibolite. Unit intruded by Early and Middle Jurassic Don Pedro intrusive suite (unit Gdp) and the southern plutons of the Sierra Buttes intrusive complex (unit Gsb) with preliminary dates as old as ~370 Ma (Merguerian and Schweickert, 1987). Unit structurally overlain by Shoo Fly Complex – coherent units (unit NSSA). Harwood (1992) has the Antoine Canyon Formation depositionally overlain by the other members of the Shoo Fly Complex.
Samples with Jurassic detrital zircon MDA ages may be from fault-bounded or infolded younger units originally overlying the Shoo Fly Complex. This unit is bounded on the west by Calaveras-Shoo Fly thrust and on the east by plutonic rocks of several igneous complexes. This unit may correlate with Kernville terrane (unit KE) in southern Sierra Nevada.