1995  Schiappa, Spinosa & Snyder: 1077. Lower Permian strata
           (Unit "Pa" of Larson & Riva, 1963) of the Portuguese
           Springs locality, northern Diamond Mts. Large micritic
           concretions on sw-facing slope, 15 m above a creek bed
           in the SE1/4, SE1/4, NW1/4 sec.4, T24N R55E, Diamond
           Springs Quadrangle.