Lewis Overthrust
Geologic thrust fault of the Rocky Mountains / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Lewis Overthrust?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
The Lewis Overthrust is a geologic thrust fault structure of the Rocky Mountains found within the bordering national parks of Glacier in Montana, United States and Waterton Lakes in Alberta, Canada. The structure was created due to the collision of tectonic plates about 59-75 million years ago that drove a several mile thick wedge of Precambrian rock 50 mi (80 km) eastwards, causing it to overlie softer Cretaceous age rock that is 1300 to 1400 million years younger.
The décollement can be seen from Marias Pass as a thin tan line of rock roughly halfway up Summit Mountain and Little Dog Mountain.