A similar blurred condition of the superficial records of glacial action obtains throughout most of Oregon, Washington, British Columbia, and Alaska, due in great part to the action of excessive moisture.
在俄勒冈、华盛顿、不列颠哥伦比亚和阿拉斯加的大部分地区,冰川作用的表面记录也出现了类似的模糊情况,这在很大程度上是由于过度潮湿的作用。