Consists of a variety of rocks, including interbedded black phyllite, mafic and felsic schist, metachert and medium-gray marble, amphibolite, greenschist, and greenstone; also includes sheared metabasalt and orthogneiss along the west side of Chilkat Inlet and the Chilkat River. Gilbert and others (1987) divided these rocks into four informal units that consist of intercalated metasedimentary and metavolcanic rocks, metabasite, metavolcanic rocks, and gneiss. For partially contiguous rocks to the south in the Skagway quadrangle, Redman and others (1985) used the informal term Cheetdeekahyu group. According to Gilbert and others (1987), metamorphic grade of the Four Winds complex increases to the northeast from greenschist to amphibolite facies. Gilbert and others (1987) suggested that the Four Winds complex is overlain by Mississippian to Devonian age rocks, and hence assigned a pre-Devonian age. Karl and others (2006) report a U/Pb TIMS age of 455±5 Ma from zircon in a metamorphosed(?) felsic dike within the complex on Mount Cheetdeekahyu. They also dated a xenocrystic zircon from the dike that yielded a concordant age of 544±9 Ma, which is similar to the age of orthogneiss that intrudes the Retreat Group at False Point Retreat on Admiralty Island, as well as other orthogneiss bodies that intrude schist of the Wales Group on Prince of Wales Island