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Beatnikdan t1_jbcdpg8 wrote

You might make an adjustment to your map.

The Puget Lobe of the Cordilleran Ice sheet stretched at least as far as south as Olympia. It carved out the Puget sound and was estimated to be 3000 feet thick in Seattle.

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Ambitious-Event-5911 t1_jbdmx3v wrote

This. And it extended farther South almost to Spokane. An ice dam formed where the Clark Fork empties into Lake Pend Orellie, forming glacial Lake Missoula, and leading to epic flossing during the thaw.

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