Weathered rock in and under the drift in New Hampshire

Abstract

Research Article| August 01, 1938 Weathered rock in and under the drift in New Hampshire J. W. GOLDTHWAIT; J. W. GOLDTHWAIT Search for other works by this author on: GSW Google Scholar F. C. KRUGER F. C. KRUGER Search for other works by this author on: GSW Google Scholar GSA Bulletin (1938) 49 (8): 1183–1198. https://doi.org/10.1130/GSAB-49-1183 Article history received: 02 Mar 1938 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation J. W. GOLDTHWAIT, F. C. KRUGER; Weathered rock in and under the drift in New Hampshire. GSA Bulletin 1938;; 49 (8): 1183–1198. doi: https://doi.org/10.1130/GSAB-49-1183 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Tens of thousands of rock exposures in New Hampshire show only slight superficial alteration of glacier-worn surfaces. Long search has yielded only 46 examples of rotted rock, and these are believed to record more prolonged weathering during preglacial or interglacial time.At three localities, in particular, deeply rotted rock, of types usually fresh and sound, is covered by fresh till, and injected by long narrow dikes of the till matrix, as if already weak when the till was emplaced. Petrographic study of materials supports this view.Among other relics of weathering before the last glaciation are boulders of oddly irregular shape in the till, which are neither "meteors" nor products of postglacial decay.Other facts and considerations indicate that there is much old residual material in the till. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article.