Data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier, published (at 1:2,500,000 scale) in volume G-1 of "The Geology of Alaska" (GSA).
Get the entire data set:
magmatic.e00.gz (gzipped ArcInfo interchange file, projected 610k bytes)
magmatic.zip (zipped shapefile 380k bytes)
Latest Cretaceous and Cenozoic magmatic rocks of Alaska