ATTENTION: The software behind KU ScholarWorks is being upgraded to a new version. Starting July 15th, users will not be able to log in to the system, add items, nor make any changes until the new version is in place at the end of July. Searching for articles and opening files will continue to work while the system is being updated.
If you have any questions, please contact Marianne Reed at mreed@ku.edu .
A large impact crater beneath Hiawatha Glacier in northwest Greenland
dc.contributor.author | Kjær, Kurt H. | |
dc.contributor.author | Larsen, Nicolaj K. | |
dc.contributor.author | Binder, Tobias | |
dc.contributor.author | Bjørk, Anders A. | |
dc.contributor.author | Eisen, Olaf | |
dc.contributor.author | Fahnestock, Mark A. | |
dc.contributor.author | Funder, Svend | |
dc.contributor.author | Garde, Adam A. | |
dc.contributor.author | Haack, Henning | |
dc.contributor.author | Helm, Veit | |
dc.contributor.author | Houmark-Nielsen, Michael | |
dc.contributor.author | Kjeldsen, Kristian K. | |
dc.contributor.author | Khan, Shfaqat A. | |
dc.contributor.author | Machguth, Horst | |
dc.contributor.author | McDonald, Iain | |
dc.contributor.author | Morlighem, Mathieu | |
dc.contributor.author | Mouginot, Jérémie | |
dc.contributor.author | Paden, John D. | |
dc.contributor.author | Waight, Tod E. | |
dc.contributor.author | Weikusat, Christian | |
dc.contributor.author | Willerslev, Eske | |
dc.contributor.author | MacGregor, Joseph A. | |
dc.date.accessioned | 2020-12-01T20:59:47Z | |
dc.date.available | 2020-12-01T20:59:47Z | |
dc.date.issued | 2018-11-14 | |
dc.identifier.citation | Kjær, K. H., Larsen, N. K., Binder, T., Bjørk, A. A., Eisen, O., Fahnestock, M. A., Funder, S., Garde, A. A., Haack, H., Helm, V., Houmark-Nielsen, M., Kjeldsen, K. K., Khan, S. A., Machguth, H., McDonald, I., Morlighem, M., Mouginot, J., Paden, J. D., Waight, T. E., Weikusat, C., … MacGregor, J. A. (2018). A large impact crater beneath Hiawatha Glacier in northwest Greenland. Science advances, 4(11), eaar8173. https://doi.org/10.1126/sciadv.aar8173 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/30942 | |
dc.description | This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. | en_US |
dc.description.abstract | We report the discovery of a large impact crater beneath Hiawatha Glacier in northwest Greenland. From airborne radar surveys, we identify a 31-kilometer-wide, circular bedrock depression beneath up to a kilometer of ice. This depression has an elevated rim that cross-cuts tributary subglacial channels and a subdued central uplift that appears to be actively eroding. From ground investigations of the deglaciated foreland, we identify overprinted structures within Precambrian bedrock along the ice margin that strike tangent to the subglacial rim. Glaciofluvial sediment from the largest river draining the crater contains shocked quartz and other impact-related grains. Geochemical analysis of this sediment indicates that the impactor was a fractionated iron asteroid, which must have been more than a kilometer wide to produce the identified crater. Radiostratigraphy of the ice in the crater shows that the Holocene ice is continuous and conformable, but all deeper and older ice appears to be debris rich or heavily disturbed. The age of this impact crater is presently unknown, but from our geological and geophysical evidence, we conclude that it is unlikely to predate the Pleistocene inception of the Greenland Ice Sheet. | en_US |
dc.description.sponsorship | Danish National Research Foundation (DNRF94) | en_US |
dc.description.sponsorship | Danish Council Research for Independent research (grant no. DFF-4090-00151) | en_US |
dc.description.sponsorship | Danish Council for Independent Research (grant no. DFF-610800469) | en_US |
dc.description.sponsorship | Inge Lehmann Scholarship from the Royal Danish Academy of Science and Letters | en_US |
dc.description.sponsorship | NSF award 1129716 | en_US |
dc.description.sponsorship | University of Kansas | en_US |
dc.description.sponsorship | Villum Foundation | en_US |
dc.description.sponsorship | Aarhus University Research Foundation | en_US |
dc.description.sponsorship | NSF PLR award 1043681 | en_US |
dc.description.sponsorship | NSF PLR award 1559691 | en_US |
dc.description.sponsorship | NSF PLR award 1542736 | en_US |
dc.publisher | American Association for the Advancement of Science | en_US |
dc.rights | Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | en_US |
dc.title | A large impact crater beneath Hiawatha Glacier in northwest Greenland | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Paden, John D. | |
kusw.kudepartment | Center for Remote Sensing of Ice Sheets | en_US |
dc.identifier.doi | 10.1126/sciadv.aar8173 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-8871-5179 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-0117-1106 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-9826-8835 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-9826-8835 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-6380-962X | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-5896-6858 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-0410-3547 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-4618-3178 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-7788-9328 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-8557-5131 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-2689-8563 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-5924-0998 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-9066-7244 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-5219-1310 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-9155-5455 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-0775-6284 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-2601-1202 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-3812-6325 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-7081-6748 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-5517-2235 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.identifier.pmid | PMC6235527 | en_US |
dc.rights.accessrights | openAccess | en_US |