Tectonic Unit: TrL Name: Lewes River Description: mainly westerly derived breccia, tuff, volcanic sandstone and siltstone and limestone, locally interbedded with radiolarian chert above Cache Creek Group; marine Formation: Intermontane Belt Stikine Terrane uTr Lewes R. (clastic part), Aksala Age Range: Upper Triassic Maximum Age: 235.0 Ma Minimum Age: 208.0 Ma