Collaborative Research: Tectonics and Topography in the Transverse Ranges: Landscapes Response to Rock Uplift Rate across the Transition from Soil-Mantled to Rocky Slopes

这项研究是一项为期三年的合作研究工作，在圣盖博山脉，系统地研究山坡和通道的反应，增加岩石隆起率的关键过渡，从土壤覆盖，蠕变和碎石为主的山坡岩石，基岩滑坡为主的山坡。 发表的数据和初步的地形分析，再加上测量宇宙成因的10 Be在河流沉积物表明，（1）侵蚀速率变化系统的范围从0.1到= 1公里/马，（2）碎屑宇宙成因的10 Be是一个有效的侵蚀速率监测在这个景观。 系统的西向东变化的侵蚀速率相对统一的岩性和气候条件（已知的地形降雨模式）在圣加布里埃尔山脉提供了一个前所未有的机会来回答景观演变的几个关键问题。六个具体的可检验的假设，是至关重要的，以进一步发展的定量了解构造和地形之间的关系将进行测试，并确定了一套具体的现场网站和方法，应该产生明确的测试这些假设以及量化的基本过程。这项工作的更广泛的影响跨越了用于促进扩大研究范围的五个一般NSF标准。从根本上讲，该项目符合我们的主要教育目标：将实地研究融入不同受众的教育中，加深他们对地球表面过程的了解，并帮助弥合理论与应用以及科学与政策之间的差距。

This study is a three-year collaborative research effort in the San Gabriel Mountains to systematically study both hillslope and channel response to increasing rock uplift rate across the critical transition from soil-mantled, creep- and ravel-dominated hillslopes to rocky, bedrock landslide-dominated hillslopes. Published data and preliminary topographic analyses coupled with measurements of cosmogenic 10Be in river sediments demonstrate that (1) erosion rates vary systematically throughout the range from 0.1 to = 1 km/Ma, and (2) detrital cosmogenic 10Be is an effective erosion-rate monitor in this landscape. The systematic west-to-east variation in erosion rate with relatively uniform lithologic and climatic conditions (with a known orographic rainfall pattern) in the San Gabriel Mountains affords an unprecedented opportunity to answer several key questions in landscape evolution. Six specific testable hypotheses that are critical to further development of a quantitative understanding of the relationship between tectonics and topography will be tested, and a specific suite of field sites and methods are identified that should yield definitive tests of these hypotheses as well as quantification of the underlying processes. Broader impacts of this work span the five general NSF criteria used to promote extending the reach of the research. Fundamentally, this project fits into our main educational objective: to integrate field studies into the education of diverse audiences, furthering their understanding of Earth surface processes and helping to bridge the gaps between theory and application as well as science and policy.