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Striated Cobbles in Southern States

1928; Geological Society of America; Volume: 39; Issue: 4 Linguagem: Inglês

10.1130/gsab-39-941

1943-2674

Chester K. Wentworth,

Geology and Paleoclimatology Research

Research Article| December 30, 1928 Striated Cobbles in Southern States CHESTER K. WENTWORTH CHESTER K. WENTWORTH Search for other works by this author on: GSW Google Scholar Author and Article Information CHESTER K. WENTWORTH Publisher: Geological Society of America Received: 28 Mar 1928 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1928 Geological Society of America GSA Bulletin (1928) 39 (4): 941–953. https://doi.org/10.1130/GSAB-39-941 Article history Received: 28 Mar 1928 First Online: 02 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 CHESTER K. WENTWORTH; Striated Cobbles in Southern States. GSA Bulletin 1928;; 39 (4): 941–953. doi: https://doi.org/10.1130/GSAB-39-941 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 SocietyGSA Bulletin Search Advanced Search Abstract IntroductionThe occurrence of faceted and striated cobbles and boulders in the drift of the northern United States and Canada has been known since the earliest geological observations in America, and their glacial origin has been recognized from the time of Louis Agassiz, nearly a century ago. These scratched boulders, along with various other lithologic characteristics of the till, have been generally regarded as convincing evidence of glaciation. In some instances identification of pre-Pleistocene epochs of glaciation has rested largely, if not wholly, on the presence of such boulders. In several parts of the United States, however, striated cobbles have been found far south of the known limit of any Pleistocene invasion, in the valleys of streams that head in glaciated territory. The abundance of these cobbles shows that during glacial time these streams carried enormous loads of coarse debris, and from the large size of some of the blocks . . . 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.