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Reinterpretation of the Cedar Ridge section, Wind River Range, Wyoming: Implications for the glacial chronology of the Rocky Mountains

1999; Geological Society of America; Volume: 111; Issue: 8 Linguagem: Inglês

10.1130/0016-7606(1999)111 2.3.co;2

1943-2674

Robert D. Hall, Cheryl Jaworowski,

Pleistocene-Era Hominins and Archaeology

Research Article| August 01, 1999 Reinterpretation of the Cedar Ridge section, Wind River Range, Wyoming: Implications for the glacial chronology of the Rocky Mountains Robert D. Hall; Robert D. Hall 1Department of Geology, Indiana University–Purdue University, Indianapolis, Indiana Search for other works by this author on: GSW Google Scholar Cheryl Jaworowski Cheryl Jaworowski 2Institute for Energy Research, University of Wyoming, Laramie, Wyoming Search for other works by this author on: GSW Google Scholar Author and Article Information Robert D. Hall 1Department of Geology, Indiana University–Purdue University, Indianapolis, Indiana Cheryl Jaworowski 2Institute for Energy Research, University of Wyoming, Laramie, Wyoming Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1999) 111 (8): 1233–1249. https://doi.org/10.1130/0016-7606(1999)111 2.3.CO;2 Article history First Online: 01 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 Robert D. Hall, Cheryl Jaworowski; Reinterpretation of the Cedar Ridge section, Wind River Range, Wyoming: Implications for the glacial chronology of the Rocky Mountains. GSA Bulletin 1999;; 111 (8): 1233–1249. doi: https://doi.org/10.1130/0016-7606(1999)111 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 SocietyGSA Bulletin Search Advanced Search Abstract The Cedar Ridge stratigraphic section in the escarpment north of Bull Lake, Wind River Range, Wyoming, may be the most significant section of Quaternary sediments in the Rocky Mountains. This section contains a thick sequence of Bull Lake till, but its greater significance is as the type section or a reference section for the deposits of three pre–Bull Lake glaciations: Washakie Point (oldest), Cedar Ridge, and Sacagawea Ridge (reference section, type section at Dinwoody Lakes). However, after reexamining the tills, lake sediments, and buried soils in this section, we conclude that the stratigraphic record is best interpreted as the result of two glaciations, not the four of previous investigations. Buried soils are especially useful in deciphering the stratigraphy of this section through the contrast between well-developed interglacial soils and weakly developed interstadial soils.We conclude that only the Bull Lake and Sacagawea Ridge glaciations are represented by deposits in the Cedar Ridge section. Deposits formerly called Cedar Ridge are reinterpreted as representing an early stade of the Sacagawea Ridge glaciation. A paleomagnetic study reveals that all the sediments have normal polarity and thus are probably younger than the Brunhes-Matuyama boundary of ca. 770 ka. Although the deposits of the Cedar Ridge section have been correlated with moraines and terraces, this procedure should be done only by direct tracing or with the use of all available dating control. The best record of Quaternary glaciations in the area, however, is in the river terraces of glacial outwash origin in the Wind River basin, not the moraines and stratigraphic sections along the mountain front. 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.