A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, U.S.A
At least three sets of moraines mark distinct glacial stands since the last glacial maximum (LGM) in the Three Sisters region of the Oregon Cascade Range. The oldest stand predates 8.1 ka (defined here as post-LGM), followed by a second between ∼ 2 and 8 ka (Neoglacial) and a third from the Little I...
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| Veröffentlicht in: | Quaternary research 2009-03, Vol.71 (2), p.181-189 |
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| creator | Marcott, Shaun A. Fountain, Andrew G. O'Connor, Jim E. Sniffen, Peter J. Dethier, David P. |
| description | At least three sets of moraines mark distinct glacial stands since the last glacial maximum (LGM) in the Three Sisters region of the Oregon Cascade Range. The oldest stand predates 8.1 ka (defined here as post-LGM), followed by a second between ∼ 2 and 8 ka (Neoglacial) and a third from the Little Ice Age (LIA) advance of the last 300 years. The post-LGM equilibrium line altitudes were 260 ± 100 m lower than that of modern glaciers, requiring 23 ± 9% increased winter snowfall and 1.4 ± 0.5°C cooler summer temperatures than at present. The LIA advance had equilibrium line altitudes 110 ± 40 m lower than at present, implying 10 ± 4% greater winter snowfall and 0.6 ± 0.2°C cooler summer temperatures. |
| doi_str_mv | 10.1016/j.yqres.2008.09.002 |
| format | Article |
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The oldest stand predates 8.1 ka (defined here as post-LGM), followed by a second between ∼ 2 and 8 ka (Neoglacial) and a third from the Little Ice Age (LIA) advance of the last 300 years. The post-LGM equilibrium line altitudes were 260 ± 100 m lower than that of modern glaciers, requiring 23 ± 9% increased winter snowfall and 1.4 ± 0.5°C cooler summer temperatures than at present. 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The LIA advance had equilibrium line altitudes 110 ± 40 m lower than at present, implying 10 ± 4% greater winter snowfall and 0.6 ± 0.2°C cooler summer temperatures.</description><subject>Broken Top</subject><subject>Cascade Range</subject><subject>Glacial geology</subject><subject>Holocene</subject><subject>Little Ice Age</subject><subject>Neoglacial</subject><subject>Oregon</subject><subject>Paleoclimate</subject><subject>Three Sisters</subject><issn>0033-5894</issn><issn>1096-0287</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkM9OGzEQhy1UJFLgCbj4xIldZu3dzfrQQxqVgoQUJAJXy7EnwcGxE3tTKa_AU9f5c25Po9HMN6PfR8hNBWUFVXu_LHebiKlkAF0JogRgZ2RQgWgLYN3wGxkAcF40nagvyPeUlpB71sGAfI2oUz2mnr44tKkPGj1S5Q19DO7YLJzSVjn6sR_H3WG4Vg6DdnaVWRpRB5_6uNW9DZ6qnk4_IiJ9zQDGdAB-xvCJnk7Dmr4Hp5UPmO7oJOIi-Dv6Vr6WoytyPlcu4fWpXpK3h1_T8WPxPPn9NB49F6oG3heGN6JBzsW8xbqe86HuwAhW8ZwU6iFo1ipthhpb04pWaAYz1NVMKFTIZsrwS3J7vLuOYbPN0eXKJo3OKY9hmyQD3rQN43mRHxd1DClFnMt1zInjTlYg997lUh68y713CUJm75n6caQwZ_hjMcqkLXqNxmZRvTTB_odvTl_VahatWaBchm30Wck_ub8brqCp</recordid><startdate>20090301</startdate><enddate>20090301</enddate><creator>Marcott, Shaun A.</creator><creator>Fountain, Andrew G.</creator><creator>O'Connor, Jim E.</creator><creator>Sniffen, Peter J.</creator><creator>Dethier, David P.</creator><general>Cambridge University Press</general><general>Elsevier Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20090301</creationdate><title>A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, U.S.A</title><author>Marcott, Shaun A. ; Fountain, Andrew G. ; O'Connor, Jim E. ; Sniffen, Peter J. ; Dethier, David P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a403t-d3595e339f6e44f37c80d92130280470c26acd7ce6d6969c20bec1b9aeae2bad3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Broken Top</topic><topic>Cascade Range</topic><topic>Glacial geology</topic><topic>Holocene</topic><topic>Little Ice Age</topic><topic>Neoglacial</topic><topic>Oregon</topic><topic>Paleoclimate</topic><topic>Three Sisters</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Marcott, Shaun A.</creatorcontrib><creatorcontrib>Fountain, Andrew G.</creatorcontrib><creatorcontrib>O'Connor, Jim E.</creatorcontrib><creatorcontrib>Sniffen, Peter J.</creatorcontrib><creatorcontrib>Dethier, David P.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Quaternary research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Marcott, Shaun A.</au><au>Fountain, Andrew G.</au><au>O'Connor, Jim E.</au><au>Sniffen, Peter J.</au><au>Dethier, David P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, U.S.A</atitle><jtitle>Quaternary research</jtitle><addtitle>Quat. res</addtitle><date>2009-03-01</date><risdate>2009</risdate><volume>71</volume><issue>2</issue><spage>181</spage><epage>189</epage><pages>181-189</pages><issn>0033-5894</issn><eissn>1096-0287</eissn><abstract>At least three sets of moraines mark distinct glacial stands since the last glacial maximum (LGM) in the Three Sisters region of the Oregon Cascade Range. 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| ispartof | Quaternary research, 2009-03, Vol.71 (2), p.181-189 |
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| language | eng |
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| source | Cambridge University Press Journals Complete |
| subjects | Broken Top Cascade Range Glacial geology Holocene Little Ice Age Neoglacial Oregon Paleoclimate Three Sisters |
| title | A latest Pleistocene and Holocene glacial history and paleoclimate reconstruction at Three Sisters and Broken Top Volcanoes, Oregon, U.S.A |
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