Preservation of a Preglacial Landscape Under the Center of the Greenland Ice Sheet

Paul R. Bierman, Lee B. Corbett, Joseph A. Graly, Thomas A. Neumann, Andrea Lini, Benjamin T. Crosby, Dylan H. Rood

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Continental ice sheets typically sculpt landscapes via erosion; under certain conditions, ancient landscapes can be preserved beneath ice and can survive extensive and repeated glaciation. We used concentrations of atmospherically produced cosmogenic beryllium-10, carbon, and nitrogen to show that ancient soil has been preserved in basal ice for millions of years at the center of the ice sheet at Summit, Greenland. This finding suggests ice sheet stability through the Pleistocene (i.e., the past 2.7 million years). The preservation of this soil implies that the ice has been nonerosive and frozen to the bed for much of that time, that there was no substantial exposure of central Greenland once the ice sheet became fully established, and that preglacial landscapes can remain preserved for long periods under continental ice sheets.
Original languageEnglish
Pages (from-to)402-405
JournalScience
Volume344
Issue number6182
Early online date17 Apr 2014
DOIs
Publication statusPublished - 25 Apr 2014
Externally publishedYes

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