Pale-gray to pale-greenish-tan, locally green-weathering, small granitic, granodioritic, and tonalitic orthogneiss bodies in rubble-crop and outcrop (Till and others, 2011). Weakly to well foliated, fine- to coarse-grained, with foliation defined by weak to strong alignment of micas. Coarsest grained varieties may contain lozenge-shaped feldspar grains and thin, millimeter-thick lenses of quartz that also parallel foliation. Plagioclase and quartz, ± microcline, are dominant phases; chlorite, biotite, and white mica are minor phases and are associated with epidote, garnet, and calcite at some localities (Till and others, 2011). Phengitic white mica compositions in microcline-bearing orthogneiss bodies are consistent with crystallization at blueschist-facies conditions (Evans and Patrick, 1987). In outcrop, foliation parallels the surrounding schist; the metagranitic rocks were apparently folded in with metasedimentary rocks of the Nome Complex during the Mesozoic. Detrital zircons from metasedimentary rocks of unit Ocs of Till and others (2011), collected immediately adjacent to part of this unit in east-central Nome quadrangle, include a significant 600-Ma population, which is younger than the metagranitic rock (669±5 Ma; Till and others, 2006b). Late Proterozoic (Neoproterozoic) intrusive age based on several U/Pb zircon analyses that range from approximately 685 to 665 Ma (Patrick and McClelland, 1995; Amato and Wright, 1998; Till and others, 2006b, 2011)