Part of the plutonic complex of southern Prince of Wales Island; unit consists of foliated and locally layered leucocratic granodiorite that is associated with diorite and subordinate hypabyssal diorite, gabbro, and rocks described as leucogranodiorite by Gehrels (1992) and as alaskite by Herreid and others (1978). Diorite is medium grained and consists of green hornblende locally intergrown with brown biotite, altered plagioclase, and subordinate quartz and K-feldspar; it is moderately layered or foliated and locally cataclastic (Gehrels, 1992). Granodiorite is fine-grained, and has a foliation that is defined by elongate hornblende and quartz grains. Highly foliated rocks are generally confined to narrow domains that may have been ductile shear zones. Contact relations and variability of foliation indicate granodiorite was emplaced and deformed prior to complete crystallization of diorite (Gehrels, 1992). Leucogranodiorite contains interlocking and commonly myrmekitic plagioclase, quartz, and microperthite; plagioclase is commonly altered to white mica, calcite, and epidote. Ferromagnesian minerals are totally altered to chlorite and opaque grains. Intrudes the diorite and rocks interpreted to be the Descon Formation (part of map unit SOd); overlain by Karheen Formation (Gehrels, 1992). These plutons yield U/Pb ages in the range of 472 to 445 Ma (Gehrels, 1992)