Maps of Wrangellia flood basalts in:
Southeast Alaska
Vancouver Island, British Columbia
Alaska, Yukon, and British Columbia

See the Supplementary Google Earth file, figure and map files, and data files on the Supplementary file page. Reference for full article:
Greene, A. R., Scoates, J. S., Weis, D., Katvala, E. C., Israel, S. and Nixon, G. T. (2010). The architecture of oceanic plateaus revealed by the volcanic stratigraphy of the accreted Wrangellia oceanic plateau. Geosphere, v. 6, p. 47-73, doi:10.1130/GES00212.1.