Geomorphic Development and Neotectonic Deformation of Paleolake Coasts in the Eastern Great Basin

该项目将（1）重建最近的区域模式 东部更新世海岸过程和海岸年代学 大盆地，（2）调查300至400个垂直控制点上选择 具有相对较好约束年龄的海岸线，（3）使用这些 作为长基线倾斜仪来重建 区域和局部均衡与地震构造变形; 对这些数据进行建模，以约束 地球 海岸年代学和海岸线研究近况 邦纳维尔湖盆地和附近两个古湖泊的形态测量学 表明晚更新世海岸线变形 主要来自邦纳维尔湖施加的负荷，但可能包括 远场响应大陆冰盖施加的负载。 这 这项研究将大大扩展现有的数据集，包括 海进、最大期和海退海岸线的变形 最后一个深湖周期在16个古湖泊盆地在东部大 盆地 海岸年表和海岸地貌学的研究将是 结合使用电子测距的垂直控制测量 测量经纬仪，以确定空间和时间维度 湖后变形 在月球和行星研究所， 观测到的偏转（海岸线倾斜）将被模拟为响应 一个分层的弹性/粘弹性地球的负荷所施加的小 湖，更大的邦纳维尔湖，还有更大的，但 更遥远的劳伦蒂德和科迪勒拉冰盖。

This project will (1) reconstruct regional patterns of late Pleistocene coastal processes and coastal chronology in the eastern Great Basin, (2) survey 300 to 400 vertical control points on selected shorelines having relatively well constrained ages, (3) use those surveryed shorelines as long-baseline tiltmeters to reconstruct regional and local isostatic and seismotectonic deformation; (4) and model those data to constrain the mechanical/rheological properties of the earth. Recent studies of coastal chronology and shoreline morphometry in the basins of Lake Bonneville and two nearby paleolakes indicate that deformation of late Pleistocene shorelines resulted mainly from loads imposed by Lake Bonneville, but probably included far-field responses to loads imposed by continental ice sheets. This study will vastly expand the existing data set, to include the deformation of transgressive, maximum-stage, and regressive shorelines of the last deep-lake cycle in 16 paleolake basins in the eastern Great Basin. Studies of coastal chronology and coastal geomorphology will be combined with vertical control surveying using an electronic distance measuring theodolite to define the spatial and temporal dimensions of post-lacustrine deformation. At the Lunar and Planetary Institute, the observed deflections (shoreline tilt) will be modelled as the response of a layered elastic/visco-elastic earth to loads imposed by the small lakes, the much larger Lake Bonneville, and the still more massive but more distant Laurentide and Cordilleran ice sheets.