The impressive thing about the Crater Lake/Mount Mazama eruption is that you can still find the ash layer from it in locations hundreds or even thousands of mil

The impressive thing about the Crater Lake/Mount Mazama eruption is that you can still find the ash layer from it in locations hundreds or even thousands of miles away. There's an 8 inch layer visible in many locations in the Okanagan Valley of Northern Washington, which is about 500 miles away by car. [1] https://en.wikipedia.org/wiki/Mazama_Ash https://en.wikipedia.org/wiki/Mazama_Ash