Mesozoic Extensional Processes in the Sevier Orogen: Studies in the Funeral Mountains, CA-NV and the Bitterroot Mountains, ID-MT

有证据表明，在几个造山带中，大规模伸展与整体挤压在构造会聚过程中同时进行。当挤压作用在深部进行时，伸展通常位于较高的构造水平，但相对范围和位移并未得到很好的了解。该项目继续调查爱达荷州和蒙大拿州比特罗特山脉在塞维尔造山带期间可能发生的中生代伸展。先前的结果表明，在这一构造事件期间，伸展作用在加利福尼亚州的殡葬山脉进行。这项工作将有助于确定这一现象对Sevier造山带的区域范围和重要性。这一结果对于理解挤压造山带中伸展作用的一般意义具有重要意义。

Evidence that large scale extension operates at the same time as overall compression during tectonic convergence has been observed in several orogens. The extension is usually at high structural levels while compression is operating at depth, however the relative extent and displacements are not well understood. This project continues, investigation of possible Mesozoic extension in the Bitterroot Mountains of Idaho and Montana that occurred during the Sevier Orogen. Prior results indicate that extension operated in the Funeral Mountains of California during this tectonic episode. This work will help determine the regional extent and importance of this phenomena for the Sevier Orogen. The results should be applicable to understanding the general significance of extension in compressional orogens.