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Quartz-grain surface textures: Evidence for middle Carboniferous glacial sediment input to the Parrsboro Formation of Nova Scotia

1985; Geological Society of America; Volume: 13; Issue: 4 Linguagem: Inglês

10.1130/0091-7613(1985)13 2.0.co;2

1943-2682

A. Murray D'Orsay, H. W. van de Poll,

Geological formations and processes

Research Article| April 01, 1985 Quartz-grain surface textures: Evidence for middle Carboniferous glacial sediment input to the Parrsboro Formation of Nova Scotia A. Murray D'Orsay; A. Murray D'Orsay 1Department of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada Search for other works by this author on: GSW Google Scholar H. W. van de Poll H. W. van de Poll 1Department of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information A. Murray D'Orsay 1Department of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada H. W. van de Poll 1Department of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (4): 285–287. https://doi.org/10.1130/0091-7613(1985)13 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation A. Murray D'Orsay, H. W. van de Poll; Quartz-grain surface textures: Evidence for middle Carboniferous glacial sediment input to the Parrsboro Formation of Nova Scotia. Geology 1985;; 13 (4): 285–287. doi: https://doi.org/10.1130/0091-7613(1985)13 2.0.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 Scanning electron microscope examination of quartz grains obtained from lacustrine limestones marginal to an alluvial fan in the middle Carboniferous Parrsboro Formation (Riversdale Group) reveals surface characteristics typical of glacial transport. This suggests that a paleoclimate sufficiently cool to support mountain glaciation may have existed in the northeastern Appalachians during middle Carboniferous time. This evidence of a cool paleoclimate is contrary to conventional interpretations of Carboniferous paleoclimates, which are considered to have been warm. The glacially modified quartz grains may represent a paleoclimatic event that can be used in stratigraphic subdivision of middle Carboniferous strata and can also be used to separate the Canso and Riversdale Groups of the middle Carboniferous of eastern Canada. The boundary between the Canso and Riversdale Groups is, at present, recognized as being of a time-transgressive nature. 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.