When Glacial Lake Missoula's ice dam shattered ... day Missoula and other parts of northwest Montana are the former shorelines etched into hills like this one in the Flathead River Valley.

The great continental ice sheets were melting very fast in the time of Glacial Lake Missoula, shedding great torrents of meltwater every summer, raising sea level an average of approximately 100 ...

Oregon is a great place for geology geeks. Enormous lava flows, Ice Age megafloods, massive volcanic eruptions —we bear ...

Fifteen thousand years ago, during the last Ice Age, a glacial dam collapsed in what is now northern Idaho, releasing the waters of a giant inland sea known as Lake Missoula. Five hundred cubic ...

At this time, the Okanogan Lobe and Purcell Trench Lobe blocked the Columbia River, forming glacial lakes Columbia and Missoula. Glacial Lake Missoula was metastable and its ice dam released episodic ...

Then, via Glacier National Park's Going-to-the-Sun Road, the route goes to Whitefish. Then, head down U.S. Route 93 to ...