Tylerhorse Canyon schist
Tylerhorse Canyon schist
Early Jurassic and Late Triassic(?)
Gray schist, marble, and metatuff. Intruded by (predates) ~147 Ma granodiorite dikes. Has yielded one specimen of a bivalve strongly resembling the Early Jurassic genus Weyla along with a detrital zircon MDA of ~240 Ma (Chapman and others, 2012).