Light-brown-weathering, massive to laminated, light-, bluish-, and dark-gray marble on Revillagigedo Island (Silberling and others, 1982; Berg and others, 1978, 1988). This marble contains locally conspicuous, dark-green, dark-gray, or rusty-weathering pyritic phyllite and semischist, polymictic sedimentary breccia or conglomerate that has angular to subrounded clasts of basalt, marble, and felsic(?) metatuff in a matrix of green metatuff and dark-gray argillite, schistose fragmental (volcaniclastic?) rocks, and greenish-black basalt dikes and sills (Berg and others, 1988). Marble on Revillagigedo Island and on the mainland east of Admiralty Island (the “Taku terrane”) may not be correlative with Permian carbonate rocks elsewhere in southeast Alaska (the “Alexander terrane”) based its association with Middle Triassic strata not present to the west (Silberling and others, 1982). Rocks of this unit are exposed widely in southeast Alaska west of the Coast Plutonic Complex of Brew and Morrell (1979b); where not mapped separately, are included in unit MzPzss