There is controversy over how the overthrust movement occurred and the effect this movement had on the surrounding geology. More specifically, attempting to determine if the thrust movement was continuous or if movement was subject to a more stick-slip style of movement remains inconclusive. However, the anomalously high vitrinite reflectance values obtained from the Lewis thrust at Marias Pass, the McConnell thrust at Mt.
There is controversy about the nature of the overthrust movement and its geological effects. Specifically, determining whether the movement was continuous or followed a stick-slip pattern remains unclear. Additionally, anomalous vitrinite reflectance values from the Lewis thrust at Marias Pass and the McConnell thrust at Mt.