Collaborative/RUI: Late-Quaternary Glacial and Paleoclimate History of the Uinta Mountains, Northeastern Utah

合作/RUI：犹他州东北部尤因塔山脉的晚第四纪冰川和古气候历史

基本信息

批准号：
0345112
负责人：
Jeffrey Munroe
金额：
$ 8.84万
依托单位：
Middlebury College
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2004
资助国家：
美国
起止时间：
2004-08-01 至 2008-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0345112&HistoricalAwards=false
关键词：
Collaborative RUI Late Quaternary Glacial

项目摘要

ABSTRACTThe Uinta Mountains contain a well-preserved record of alpine glacier extents and behavior during the latestPleistocene. Yet, this record has not been studied in detail at the range-wide scale, and the timing of the Last GlacialMaximum (LGM) and subsequent deglaciation have not been determined. Documenting the spatial and temporalextent of late-Quaternary glaciation in the Uinta range is warranted for several reasons. First, the location of the range - central among well-dated alpine glacial localities and adjacent to the eastern edge of the Lake Bonneville basin - provides great potential for examining the regional effect of Lake Bonneville on paleoclimate and glaciation in northeastern Utah. Second, the orientation of the Uinta range provides a unique opportunity to study a record of large glaciers that flowed both north and south within a single mountain range. Finally, the excellent preservation of moraines and resistant lithology of erratic boulders provides ideal targets for cosmogenic surface-exposure dating. We propose to use a combination of conventional and advanced research methods to study the late-Quaternary glacial and paleoclimate record of the Uinta Mountains in pursuit of the following goals:1) Determine the extent and timing of glaciation in the Uinta Mountains during and since the LGM. Thiseffort will involve (1) detailed field and air photograph mapping of the surficial geology of the south flank ofthe Uinta Mountains (2) cosmogenic surface-exposure dating of moraines deposited during the LGM in thewestern, central, and eastern Uintas and (3) retrieval and study of lake sediment cores from lakes dammed by recessional moraines across the north and south slopes of the range.2) Reconstruct the latest Pleistocene paleoclimate from glacial records across the Uinta Mountains. Becausethe extents of glaciers are a function of temperature and precipitation, glacial records are excellent proxies of climate change. We will use the geomorphic records of latest Pleistocene glaciers to validate numericalmodeling experiments that simulate glacier growth based on climate input parameters; this will allow for aunique determination of LGM paleoclimate in the Uinta Mountains.Broader ImpactsThe research outlined in this proposal will yield benefits beyond pursuit of the core scientific objectives. First, it will further the ongoing relationship between the Ashley National Forest (ANF) and UW-Madison. Due to rising public use and more intensive management of National Forests, supervisors of the ANF have developed a greater interest in the geologic history of forest land and have supported graduate student research in the Uinta Mountains for the past 8 years (e.g., Douglass, 2000; Munroe, 2001; Carson, 2003) and continue to support current graduate research (B. Laabs, this study; see letter of support). Second, Ph.D. student B. Laabs will participate in the new NSF Center for the Integration of Research Teaching and Learning (CIRTL), an NSF-sponsored program that was launched at the UW-Madison to prepare the next generation of college science professors. He will participate in CIRTL courses and workshops focused on the effective use of research methods to disseminate scientific knowledge in the college classroom. Laabs will be among the first graduate students to receive a certificate acknowledging preparation for a career in academia and bring the fruits of this NSF-UW-Madison partnership into the U.S. higher education system. Finally, J. Munroe (Middlebury College) has built upon his graduate work in the Uintas and has begun including undergraduates in his current research on the late Quaternary history of the area. The proposed research provides the opportunity for three senior geology majors to pursue undergraduate theses on facets of theoverall research objectives (see RUI impact statement for more information).

摘要Uinta山脉包含保存完好的高山冰川范围和在最新杂化期间的行为记录。然而，尚未在范围范围内详细研究该记录，并且尚未确定最后一个冰川敏度（LGM）的时机（LGM）和随后的脱胶。由于有几个原因，保证在UINTA范围内记录UINTA范围中期晚期冰川的空间和颞叶。首先，该范围的位置 - 在良好的高山冰川地区以及毗邻邦纳维尔湖盆地东部边缘的中心位置 - 为研究邦纳维尔湖对犹他州东北部古气候和冰川的区域影响提供了巨大的潜力。其次，UINTA系列的方向为研究大型冰川的记录提供了独特的机会，这些冰川在单个山脉内均流向北部和南方。最后，对山地的极好保存和抗性巨石的抗性岩性为宇宙基础暴露约会提供了理想的目标。我们建议将常规和先进的研究方法结合起来，研究UINTA山脉的期末冰川和古气候记录，以追求以下目标：1）确定在LGM期间和以来，UINTA山脉冰川山脉的程度和时间。该富特将涉及（1）在Uinta山脉南侧的浅层地质（2）详细的田地和空气照片映射（2）在LGM期间沉积的冰ora的山地阳离子约会（2）在Western，Central，Central，Eastern，Uintas和Easterther uintas，以及（3）从湖泊中居住的湖泊中的山层和研究范围内的山层居住区的山地沿山脉的回收范围和研究范围内的山层的山地上的山地上的山地上居住了2来自UINTA山脉冰川记录的最新更新世古气候。因为冰川的范围是温度和降水的函数，因此冰川记录是气候变化的极好代理。我们将使用最新更新世冰川的地貌记录来验证基于气候输入参数的冰川增长的数值模拟实验；这将允许在UINTA山脉中确定LGM古气候。Broader影响该提案中概述的研究将产生不超出追求核心科学目标的好处。首先，它将进一步促进阿什利国家森林（ANF）和威斯康星大学麦迪逊岛之间的持续关系。由于公众使用的增加和对国家森林的更深入管理，ANF的主管对森林土地的地质历史产生了更大的兴趣，并在过去的8年中支持了UINTA山的研究生研究（例如，Douglass，2000; Munroe，2001; Munroe，2001; Carson; Carson，2003，2003''，并继续支持当前的研究生研究（B. Laabs，B. Laabs;参见本研究）。第二，博士学位学生B. LAABS将参加新的NSF研究教学整合中心（CIRTL），这是一项由NSF赞助的计划，该计划在UW-Madison启动，以准备下一代大学科学教授。他将参加CIRTL课程和讲习班，专注于有效利用研究方法来传播大学教室中的科学知识。 LAABS将是首批获得证书的研究生，该证书确认为学术界的职业做准备，并将这种NSF-UW-Madison合作伙伴的成果带入美国高等教育系统。最后，J。Munroe（Middlebury College）建立在他在UINTAS的研究生工作基础上，并开始在他目前关于该地区晚期历史的研究中包括本科生。拟议的研究为三个高级地质专业专业的研究提供了机会，可以在Theoverall研究目标的方面追求本科论文（有关更多信息，请参见Rui Impact声明）。