Wikipedia contributors. (2025, September 30). Renton Formation. In Wikipedia, The Free Encyclopedia. Retrieved 03:49, February 3, 2026, from https://en.wikipedia.org/w/index.php?title=Renton_Formation&oldid=1314161510
Renton Formation (Wikipedia) The Renton Formation is a geologic formation in Washington (state) within the Puget Group. It preserves fossils dating back to the Paleogene period.