Geochronologic studies in central New England II: Post-Acadian hinged and differential uplift

Research Article| February 01, 1989 Geochronologic studies in central New England II: Post-Acadian hinged and differential uplift T. Mark Harrison; T. Mark Harrison 1Department of Geological Sciences, State University of New York at Albany, Albany, New York 12222 Search for other works by this author on: GSW Google Scholar Frank S. Spear; Frank S. Spear 2Department of Geology, Rensselaer Polytechnic Institute, Troy, New York 12180 Search for other works by this author on: GSW Google Scholar Matthew T. Heizler Matthew T. Heizler 1Department of Geological Sciences, State University of New York at Albany, Albany, New York 12222 Search for other works by this author on: GSW Google Scholar Geology (1989) 17 (2): 185–189. https://doi.org/10.1130/0091-7613(1989)017<0185:GSICNE>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation T. Mark Harrison, Frank S. Spear, Matthew T. Heizler; Geochronologic studies in central New England II: Post-Acadian hinged and differential uplift. Geology 1989;; 17 (2): 185–189. doi: https://doi.org/10.1130/0091-7613(1989)017<0185:GSICNE>2.3.CO;2 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 40Ar/39Ar analyses of muscovite, biotite, and K-feldspar from central New England reveal a remarkable pattern of mineral ages: the ages are progressively younger from central to western New Hampshire and rise sharply near the Vermont border to ages more typical of post-Acadian cooling. This distribution is attributed to differential uplift via isostatic rebound of an anomalously thickened crust at the Bronson Hill anticlinorium. This explanation requires that between 6 and 8 km of normal fault motion has occurred on structures in western New Hampshire, not previously recognized to have accommodated this kind or magnitude of displacement. This hinged, differential uplift occurred from ∼360-170 Ma and is consistent with a time constant for rebound of ∼80 m.y. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.