Sanak-Baranov plutonic belt 

(Late Cretaceous and early Tertiary) 

(Coastal southern Alaska, units TKpf, mTpf)

Forms a broad belt across coastal Southern Alaska. Consists chiefly of granite and lesser granodiorite that 
intruded immediately after a period of intense deformation and regional metamorphism associated with 
accretion of younger part of Chugach terrane and Prince William terrane. Unit yields K-Ar ages that range 
from 45 to 60 Ma. Locally associated with Chugach metamorphic complex in eastern-southern Alaska. 
Interpreted as forming during underthrusting of Kula oceanic ridge along the early Tertiary Alaskan 
continental margin. REFERENCES: Hudson, 1983; Plafker and others, 1989b; Moll-Stalcup, 1994; Moll-
Stalcup and others, 1990, 1994; Farmer and others, 1993.