Alaska PaleoGlacier Atlas: A Geospatial Compilation of Pleistocene Glacier Extents

Three decades after the last Alaska-wide compilations of glacial
geology (Karlstrom et al., 1964; Coulter et al., 1965), we have
coordinated a broadly collaborative effort to create a digital map of
reconstructed Pleistocene glaciers. The Alaska PaleoGlacier Atlas is a
geospatial summary of Pleistocene glaciation across Alaska. The layers
in the atlas depict: 1) the extent of glaciers during the late
Wisconsin glaciation (i.e. Last Glacial Maximum, about 20,000 years
ago), and 2) the maximum extent reached during the last ca. 3 million
years by the northwestern Cordilleran Ice Sheet, ice caps, and valley
glaciers. The atlas is targeted for a scale of 1 to 1,000,000 --
suitable for visualization and regional analyses. Former glacier
extents are based on decades of field-based mapping, air-photo
interpretation, and a variety of dating methods. In all, the first
version combines glacial-geologic information from 26 publications and
42 source maps.

Revisions will be made and released as time and resources allow. A
companion paper (Kaufman and Manley, subm.; part of an INQUA effort
for a global atlas with regional reviews) summarizes the
glacial-geologic evidence and highlights recent revisions, remaining
uncertainties, and implications for paleoclimate forcing.

See:
"http://instaar.Colorado.EDU/QGISL/ak_paleoglacier_atlas/apg_overview.html"