Internal Deformation Within a Moving, Composite Super- terrane: Evidence from Southwest British Columbia

一个复合的外来超级岩石现在构成了 产于华盛顿西部、不列颠哥伦比亚省和阿拉斯加南部。 古地磁和古生物学数据表明， 这一系列的卫星有一部分是在赤道纬度组装的， 在晚白垩世-早第三纪时期， 它向北移动，沿着 北美洲西部边缘。 几种假设， 本研究将测试最终侵位的构造。 它们是晚侏罗世至早白垩世的变形 其中，左斜肌是一种对左斜肌转换的反应。 早白垩世至中白垩世的变形主要是 而在《易经》中，《易经》是一部经典。 开始于Cenomanian晚期。 中间阶层 侏罗纪到晚白垩世的Tyaughton盆地应该记录了这些 小位移断层中的假定事件。 本研究 通过宏微观分析确定古应力 结构数据从年轻的单位和减去结果， 老单位相继。 通过这一回剥，一个历史， 将获得古应力，这将允许假设 测试.

A composite allochthonous super terrane now constitutes much of western Washington, British Columbia and southern Alaska. Paleomagnetic and paleobiologic data suggest that the western part of this terrane was assembled in equatorial latitudes and that during Late Cretaceous - early Tertiary time the composite terrane moved northward toward its present position along the western margin of North America. Several hypotheses concerning the tectonics of final emplacement will be tested in this study. These are that Late Jurassic to earliest Cretaceous deformation within the terrane was a response to sinistral oblique conver- gence, that early to mid-Cretaceous deformation was dominantly convergent and that the onset of dextral transcurrent deforma- tion began in late Cenomanian time. Strata of the Middle Jurassic to late Cretaceous Tyaughton basin should record these postulated events in faults of small displacement. This study will determine the paleo-stress by analysis of macro and micro structural data from younger units and subtracting results from successively older units. By this back-stripping, a history of paleostress will be obtained that will allow hypotheses to be tested.