A Nick Zentner video
The only fresh-water remains of of the massive glacial lakes of the ice age are today’s Lake Washington and Lake Sammamish.
Nick even talks about the huge coal mines in the Seattle area in the 1800s. (Would you have guessed that Seattle once produced 22 percent of the coal used at the time on the Pacific coast?)
Nick Zentner is the science outreach and education coordinator for the Department of Geological Sciences at Central Washington University. He has produced more than 40 short videos about Central Washington geology.