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Late Cretaceous unroofing of the White Mountains, New Hampshire, USA: An episode of passive margin rejuvenation?

2016; Geological Society of America; Volume: 44; Issue: 6 Linguagem: Inglês

10.1130/g37429.1

1943-2682

William H. Amidon, Mary K. Roden‐Tice, Alyssa J. Anderson, R. E. McKeon, David L. Shuster,

Seismic Waves and Analysis

Research Article| June 01, 2016 Late Cretaceous unroofing of the White Mountains, New Hampshire, USA: An episode of passive margin rejuvenation? W.H. Amidon; W.H. Amidon 1Department of Geology, Middlebury College, Middlebury, Vermont 05753, USA Search for other works by this author on: GSW Google Scholar M. Roden-Tice; M. Roden-Tice 2Center for Earth and Environmental Science, State University of New York at Plattsburgh, Plattsburgh, New York 12901, USA Search for other works by this author on: GSW Google Scholar A.J. Anderson; A.J. Anderson 1Department of Geology, Middlebury College, Middlebury, Vermont 05753, USA Search for other works by this author on: GSW Google Scholar R.E. McKeon; R.E. McKeon 3Cold Regions Research and Engineering Laboratory, U.S. Army Corps of Engineers Engineer Research and Development Center, Hanover, New Hampshire 03755, USA Search for other works by this author on: GSW Google Scholar D.L. Shuster D.L. Shuster 4Department of Earth and Planetary Science, University of California–Berkeley, Berkeley, California 94720, USA Search for other works by this author on: GSW Google Scholar Author and Article Information W.H. Amidon 1Department of Geology, Middlebury College, Middlebury, Vermont 05753, USA M. Roden-Tice 2Center for Earth and Environmental Science, State University of New York at Plattsburgh, Plattsburgh, New York 12901, USA A.J. Anderson 1Department of Geology, Middlebury College, Middlebury, Vermont 05753, USA R.E. McKeon 3Cold Regions Research and Engineering Laboratory, U.S. Army Corps of Engineers Engineer Research and Development Center, Hanover, New Hampshire 03755, USA D.L. Shuster 4Department of Earth and Planetary Science, University of California–Berkeley, Berkeley, California 94720, USA Publisher: Geological Society of America Received: 14 Oct 2015 Revision Received: 28 Mar 2016 Accepted: 08 Apr 2016 First Online: 09 Mar 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2016 Geological Society of America Geology (2016) 44 (6): 415–418. https://doi.org/10.1130/G37429.1 Article history Received: 14 Oct 2015 Revision Received: 28 Mar 2016 Accepted: 08 Apr 2016 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation W.H. Amidon, M. Roden-Tice, A.J. Anderson, R.E. McKeon, D.L. Shuster; Late Cretaceous unroofing of the White Mountains, New Hampshire, USA: An episode of passive margin rejuvenation?. Geology 2016;; 44 (6): 415–418. doi: https://doi.org/10.1130/G37429.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The growing recognition that many passive margins have experienced periods of post-rift uplift has raised new questions about the nature of the tectonic processes that drive such uplift. The eastern North America margin is of particular interest because it is a classic Atlantic-style margin that has long been suspected of tectonic rejuvenation, yet the timing of post-rift uplift events remains elusive. To address this question we present apatite U-Th/He and fission track ages from a 1300 m vertical transect in the White Mountains of New Hampshire (USA), including a 910-m-deep bore hole. Thermal modeling suggests a period of accelerated denudation from ca. 85 to 65 Ma. This timing is broadly similar to the timing of accelerated exhumation and compression on passive margins elsewhere in the Atlantic, raising the question of whether a common mechanism, such as a change in lateral stresses, changes in mantle convection, or climate change, could be responsible. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.