Statistical Estimates of Uplift from Stream Gradients and other Tectonically Sensitive Topographic Features

小行星9418681 该项目将确定和量化低起伏地区（如新马德里地震带）过去和相对较新的构造活动造成的变形，这些地区通常远离板块边界，可能被数千米的沉积物覆盖。以前的地貌方法在过去几乎没有成功;这个项目将开发和测试新的方法，这些方法是基于对河流通过切割、加积或改变其弯曲度来调整其通道以适应外部变化的观察。 该方法是一种统计方法，相对便宜。 它使用地形图而不是实地工作。该项目的成果将为任何遭受大地震的低起伏大陆地区提供有用的侦察工具，并将深刻地提高我们对大陆活动构造的认识。

9418681 Hesterberg This project will locate and quantify deformation due to past, relatively recent tectonic activity in areas of low relief, such as the New Madrid seismic zone, which are often located far from plate boundaries and may be overlain by thousands of meters of sediments. Previous geomorphic methods have had little success in the past; this project will develop and test new methods that are based on the observation that streams adjust their channels to external change by incising, aggrading, or altering their sinuosity. The method is a statistical one and relatively inexpensive. It uses topographic maps rather than field work. The results of this project will provide a useful reconnaisance tool for any low relief continental area subject to large earthquakes and will profoundly improve our understanding of active tectonics in the cratonic regions of continents.