Figure 4. Stratigraphy of accreted section of the Wrangellia oceanic plateau in Alaska, Yukon, and British Columbia (locations for areas of stratigraphic columns are shown in Figure 2). (a) Stratigraphic column of the Amphitheater Mountains, Alaska, derived from Nokelberg et al. (1985). (b) Stratigraphic column for the south side of the Wrangell Mountains, derived from Smith & MacKevett (1970) and MacKevett (1978). (c) Stratigraphic column of the Kluane Ranges, Yukon derived from Israel et al. (2006). (d) Stratigraphic column of northern and central Vancouver Island, derived from Nixon et al. (2006). Total estimated stratigraphic thicknesses for the Nikolai and Karmutsen Formations are outlined with boxes.