Terrane Unit : CG Name : Chugach Description : Cretaceous greywacke, argillite and melange of Triassic to Lower Cretaceous blocks in a Lower Cretaceous matrix form the inner part of an accretionary prism in the northwestern most part of the Insular Belt Assemblages : KV Valdez Plutonic Rocks : None Age Range: Cretaceous Maximum Age: 145.0 Ma Minimum Age: 97.0 Ma