Collaborative Research: Late Cenozoic Evacuation of the Rocky Mountain Orogenic Plateau

0106029海勒0106223 Dethier落基山脉中部新生代沉积岩的广泛残留可能表明，以前存在一个大型的后Laramide盆地填充物，随后大部分被移除。 如果这种区域性盆地填充能够得到证实，它将为确定沉积物去除的程度和速度提供一个区域标志，并为新生代晚期的垂直构造运动提供一个标志。 该项目将结合联合收割机裂变轨迹测绘和宇宙成因核素地质年代测定法，试图确定Laramide盆地后充填的先前范围和连续性，并寻找所观察到的变化的可能的构造或地质原因。 结果将有助于澄清构造与气候驱动的隆升的竞争效应。

0106029 Heller0106223 DethierWidespread remnants of Cenozoic sedimentary rocks in the central Rocky Mountains may indicate the former presence of a large post-Laramide basin fill that has subsequently been largely removed. If such a regional basin fill can be demonstrated, it would provide a regional marker for determining the extent and rate of sediment removal and provide a marker for vertical tectonic movement during the late Cenozoic. This project will combine mapping fission-track and cosmogenic nuclide geochronometry to attempt to determine the former extent and continuity of the post-Laramide basin fill, and to search for possible tectonic or geologic causes of the observed changes. Results will help clarify the competing effects of tectonic verses climatically driven uplift.