Plumes of glacial flour, powdery sediment found in glacial runoff, was carried from Mount Rainier into Commencement Bay by the Puyallup River.
https://www.king5.com/mobile/article/tech/science/environment/commencement-bay-waters-clouded-glacial-flour-historic-heat-wave-climate/281-3d7271c6-525f-4955-a195-8f3dbdbbc022