Grapevine Canyon paragneiss and Grapevine Peak migmatite of Chapman and Saleeby [2012]
Grapevine Canyon paragneiss and Grapevine Peak migmatite of Chapman and Saleeby [2012]
Mesozoic and(or) Paleozoic(?)
Strongly foliated kyanite- and garnet-bearing metasandstone and metapelite. This unit lacks protolith age control, though it predates the surrounding ~100-136 Ma Tehachapi-San Emigdio intrusive complex (unit Gte). The unit has yielded biotite K-Ar, Ar-Ar, and Rb-Sr ages of ~86-91 Ma (Evernden and Kistler, 1970; Saleeby and others, 2007).