Weathering rinds as a relative-age criterion: Application to subdivision of glacial deposits in the Cascade Range

Research Article| March 01, 1975 Weathering rinds as a relative-age criterion: Application to subdivision of glacial deposits in the Cascade Range Stephen C. Porter Stephen C. Porter 1Department of Geological Sciences and Quaternary Research Center, University of Washington, Seattle, Washington 98195 Search for other works by this author on: GSW Google Scholar Author and Article Information Stephen C. Porter 1Department of Geological Sciences and Quaternary Research Center, University of Washington, Seattle, Washington 98195 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1975) 3 (3): 101–104. https://doi.org/10.1130/0091-7613(1975)3<101:WRAARC>2.0.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 Stephen C. Porter; Weathering rinds as a relative-age criterion: Application to subdivision of glacial deposits in the Cascade Range. Geology 1975;; 3 (3): 101–104. doi: https://doi.org/10.1130/0091-7613(1975)3<101:WRAARC>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 The thickness of weathering rinds on surface and near-surface clasts of Teana-way Basalt from alpine drift sheets in the southeastern North Cascade Range varies systematically with age of deposit. The rinds, which can be measured to the nearest 0.1 mm, result from oxidation of mafic minerals and mineraloids. Rind thicknesses for outermost moraines of three principal Pleistocene drift sheets are 1.96 ± 0.24 mm, 1.10 ± 0.11 mm, and 0.71 ± 0.12 mm. Sample variance may result from differences in composition and texture of clasts, microclimatic differences at sample sites, and incorporation of previously weathered stones. Weathering rinds can be used to construct relative time-distance curves for Cascade glaciers, but because rate of rind formation appears to be nonlinear, the true age of drift sheets cannot be obtained unless the weathering rate is calibrated by radio-metric dating. 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.