Structural Thickening, Uplift, and Denudation of the Olympic Subduction Complex

卡斯卡迪亚会聚边缘位于俄勒冈州、华盛顿州和温哥华岛的西侧，标志着北美和胡安德富卡板块之间的俯冲边界。除奥林匹克半岛段外，弧前地区被始新世下部玄武岩覆盖，那里的隆升使玄武岩倾斜成一个向东倾斜的睡眠背斜，并暴露了下伏的奥林匹克俯冲杂岩。这项研究将继续一项旨在了解这种异常抬升及其原因的项目。这些结果对奥林匹克俯冲杂岩的时间和几何形状具有重要意义，并对理解其他古代俯冲杂岩具有应用价值。

The Cascadia convergent margin, which flanks the western side of Oregon, Washington and Vancouver Island, marks the subduction boundary between North America and the Juan de Fuca plate. The forearc region is underlain by lower Eocene basalt except in Olympic Peninsula section where uplift has tilted the basalt into a sleep east-plunging anticline and has exposed the underlying Olympic subduction complex. This research will continue a project aimed at understanding this anomalous uplift and its causes. Results are important to the timing and geometry of the Olympic subduction complex and has application to understanding other ancient subduction complexes.