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Alaska Palaeo-Glacier Atlas (Version 2)


Alaska Palaeo-Glacier extents
Alaska Palaeo-Glacier Atlas v2, showing the Pleistocene maximum, early Wisconsinan, late Wisconsinan and modern glacier extents. Click here for High Resolution Figure.
Alaska Palaeo-Glacier Atlas (Version 2)

Darrell S. Kaufman1, Nicolás E. Young2, Jason P. Briner2, and William F. Manley3

In: Ehlers, J., P.L. Gibbard, and P.D. Hughes (eds), Quaternary Glaciations - Extent and Chronology - A Closer Look. Developments in Quaternary Science, Vol. 15, pp. 427-445. Elsevier, Amsterdam. ISBN: 978-0-444-53447-7
1 School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, Arizona 86011-4099, USA
2 Department of Geological Sciences, University at Buffalo, Buffalo, New York 14260, USA
3 Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309-0450, USA
* Correspondence and requests for materials should be addressed to Darrell S. Kaufman E-mail: Darrell.Kaufman@nau.edu
INTRODUCTION:
This report is an update of the Alaska Palaeo-Glacier Atlas (APG Atlas), a collaborative effort among glacial geologists working in Alaska to compile a coherent map of former glacier limits from across the state. The previous version of the digital atlas (v1) was originally available online in 2002 (Manley and Kaufman, 2002). The evidence used to draw the glacial limits in 14 regions across Alaska was described in a subsequent report (Kaufman and Manley, 2004), which was part of a larger effort to create a global database of Pleistocene glacial extents with a target scale of 1:1,000,000. This update (APG Atlas v2) is based on a more detailed map scale and, therefore, provides more accurately resolved limits of former glacier extents. In addition, the previous version included the only two glacier limits that could be most confidently mapped and correlated around the state: (1) the all-time maximum extent of former glaciers; and (2) the late Wisconsinan extent (= late Weichselian = marine isotope stage (MIS) 2 = spanning the period between about 24,000 and 12,000 years ago). In this update, we added a third mapped limit for areas where it has been sufficiently well studied, namely for the penultimate glaciation, which over most of Alaska occurred during the early Wisconsinan.
Download Images and Data:
Geospatial files of Pleistocene ice extent for three Pleistocene glaciations
(Pleistocene maximum, early Wisconsinan, late Wisconsinan glacier extents)
ARC Maps files or Google Earth KMZ file.
Cosmogenic exposure ages in Text or Excel format (also included in the Google Earth KMZ file).

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Last Updated Monday, 15-Aug-2011 08:36:05 EDT by paleo@noaa.gov
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