Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31967.1 |
Termination II, Last Glacial Maximum, and Lateglacial chronologies and paleoclimate from Big Cottonwood Canyon, Wasatch Mountains, Utah | |
Quirk, Brendon J.1; Moore, Jeffrey R.1; Laabs, Benjamin J. C.2; Caffee, Marc W.3; Plummer, Mitchell A.4 | |
2018-11-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:1889-1902 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Late Pleistocene glaciers and lakes of the Great Basin have been studied extensively due to their excellent utility as paleoclimate proxies; such records are particularly useful where interpreted in combination. The Wasatch Range on the eastern edge of the Great Basin hosted extensive glaciers during the Last Glacial Maximum (LGM), in addition to Lake Bonneville, the region's largest pluvial lake. However, the timing of range-wide glaciation in the Wasatch remains uncertain as compared to the well-established Lake Bonneville chronology. Here we present new cosmogenic exposure ages from the Wasatch Range from low altitude striated bedrock (132.2 +/- 5.9 ka), lateral moraine (20.2 +/- 1.1 ka), nested moraines (15.5 +/- 0.8 ka), and high-altitude bedrock (14.8 +/- 0.7 ka) sites. These ages broadly reveal the local timing of Termination II, LGM, and Lateglacial stadia in the Wasatch, as well as subsequent deglaciation. We then use coupled glacier energy-mass balance and ice-flow models to reconstruct LGM and Lateglacial ice extents in order to determine paleoclimate conditions necessary to produce glacier extents and estimate LGM ice extents in a catchment lacking clear terminus features. Our results provide robust limits on the extents of late Pleistocene glaciers in three drainages of the central Wasatch Mountains and suggest that LGM glaciers reached and abandoned their maxima prior to the Bonneville highstand, while later undergoing rapid deglaciation coeval with the lake's fall from the Provo level. Combining modeled paleoclimate estimates with previously published pluvial lake reconstructions yields LGM temperature depressions ranging from -10 to -8 degrees C (with respect to modern) with 80-150% of modern precipitation, with a best matching Lateglacial temperature depression of -5 degrees C with 200% of modern precipitation. These results support the hypothesis of a relatively cold LGM climate in the Great Basin with little to no increase in precipitation, followed by a period of increased precipitation and warming coincident with Heinrich Stadial 1. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449028300009 |
WOS关键词 | LAKE BONNEVILLE ; GREAT-BASIN ; CLIMATE INFERENCES ; UINTA MOUNTAINS ; ATLANTIC-OCEAN ; PLUVIAL LAKES ; JAKES VALLEY ; SLIP RATES ; AGE ; FAULT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24683 |
专题 | 地球科学 |
作者单位 | 1.Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA; 2.North Dakota State Univ, Dept Geosci, Fargo, ND 58102 USA; 3.Purdue Univ, PRIME Lab, Dept Phys, W Lafayette, IN 47905 USA; 4.Idaho Natl Lab, Idaho Falls, ID 83415 USA |
推荐引用方式 GB/T 7714 | Quirk, Brendon J.,Moore, Jeffrey R.,Laabs, Benjamin J. C.,et al. Termination II, Last Glacial Maximum, and Lateglacial chronologies and paleoclimate from Big Cottonwood Canyon, Wasatch Mountains, Utah[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:1889-1902. |
APA | Quirk, Brendon J.,Moore, Jeffrey R.,Laabs, Benjamin J. C.,Caffee, Marc W.,&Plummer, Mitchell A..(2018).Termination II, Last Glacial Maximum, and Lateglacial chronologies and paleoclimate from Big Cottonwood Canyon, Wasatch Mountains, Utah.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,1889-1902. |
MLA | Quirk, Brendon J.,et al."Termination II, Last Glacial Maximum, and Lateglacial chronologies and paleoclimate from Big Cottonwood Canyon, Wasatch Mountains, Utah".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):1889-1902. |
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