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Neoglacial Chronology in the Fourth of July Cirque, Central Colorado Front Range

1973; Geological Society of America; Volume: 84; Issue: 1 Linguagem: Inglês

10.1130/0016-7606(1973)84 2.0.co;2

1943-2674

William C. Mahaney,

Geological formations and processes

Research Article| January 01, 1973 Neoglacial Chronology in the Fourth of July Cirque, Central Colorado Front Range WILLIAM C. MAHANEY WILLIAM C. MAHANEY 1Department of Geography, York University, Toronto, Ontario, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information WILLIAM C. MAHANEY 1Department of Geography, York University, Toronto, Ontario, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1973) 84 (1): 161–170. https://doi.org/10.1130/0016-7606(1973)84 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 MailTo Tools Icon Tools Get Permissions Search Site Citation WILLIAM C. MAHANEY; Neoglacial Chronology in the Fourth of July Cirque, Central Colorado Front Range. GSA Bulletin 1973;; 84 (1): 161–170. doi: https://doi.org/10.1130/0016-7606(1973)84 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 SocietyGSA Bulletin Search Advanced Search Abstract Lichenometrical, pedological, and geological evidence are used to establish a Neoglacial chronology in Fourth of July Cirque, Colorado Front Range. Glacial and periglacial deposits are assigned ages based on a growth-rate curve developed for Rhizocarpon geographicum (Benedict, 1967). Three ages of deposits are recognized. The earliest deposits are Temple Lake till dating from about 4,500 to 2,700 yrs B.P. Younger deposits of till, locally termed Audubon, have a minimum age of 950 B.P. The most recent deposits are talus of Gannett Peak age dating from 300 to 100 B.P.Rock-stratigraphic units in the cirque have distinctive weathering features, vegetation cover, and maximum diameters of crustose lichen thalli indicative of their age. Changes in soil-profile development suggest that soils can be utilized to correlate deposits within the cirque; recent field investigations in the Colorado Front Range indicate that long-range correlations are possible. 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.