Cosmogenic Exposure Ages, Alaska Palaeo-Glacier Atlas

Author(s)

World Data Center for Paleoclimatology and NOAA Paleoclimatology Program (U.S.)

Description

This line shapefile contains cosmogenic exposure ages from late and early Wisconsinan drift linked to references in the geospatial database. Most 10Be and 26Al ages use the same or very similar production rate. All 36Cl ages use the same production rates. Refer to original reference for all details of age and scaling calculations, in addition to how authors handle erosion rate and snow shielding.This report is an update of the Alaska PalaeoGlacier Atlas. It includes information published since 2002 and is based on a more detailed map scale. In addition to the all-time maximum extent of former glaciers and the late Wisconsinan extent, this update includes the mapped limit for the penultimate glaciation, which generally occurred during the early Wisconsinan. The update also includes a compilation of cosmogenic exposure ages linked to the geospatial database. The Alaska PalaeoGlacier Atlas is a geospatial summary of Pleistocene glaciation across Alaska. Our goal is a comprehensive and consistent overview of former glacier limits across Alaska. Our hope is to facilitate outreach, education, and interdisciplinary research in the fields of geology, geography, biology, and natural history. Coastal boundary aligned with imagery, no gaps in polygon, no topological errors, aggregate and % figures verified Kaufman, D. S., Young, N. E., Briner, J. P., & Manley, W. F. (2011). Cosmogenic Exposure Ages, Alaska Palaeo-Glacier Atlas (Version 2). Available at: http://purl.stanford.edu/xp715nb1520 * References: 1 = Young et al. (2009) 2 = Briner et al. (2005) 3 = Dortch et al. (2010) 4 = Matmon et al. (2006) 5 = Matmon et al. (in press) 6 = Dortch et al. (in press) 7 = Briner et al. (2001) 8 = Briner et al. (2002) This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

Publisher

World Data Center for Paleoclimatology

Collection

Alaska Palaeo-Glacier Atlas

Place(s)

Alaska, Brooks Range (Alaska), Seward Peninsula (Alaska), Ahklun Mountains (Alaska), Kuskokwim Mountains (Alaska), Alaska Range (Alaska), Alaska Peninsula (Alaska), Kodiak Island (Alaska), Wrangell Mountains (Alaska), and Saint Elias Mountains

Subject(s)

Glaciers, Last Glacial Maximum, Cosmogenic nuclides, and Inland Waters

Year

2011

Held by

Stanford

More details at

https://purl.stanford.edu/xp715nb1520

Use and reproduction

This item is in the public domain. There are no restrictions on use.

Copyright

This work is in the Public Domain, meaning that it is not subject to copyright.