The Giant Ripples of Camas Prairie

The question mark was his. Joseph Pardee, a Geological Survey geologist, described Glacial Lake Missoula from its shorelines in 1910, and in 1925 he wrote privately to J Harlen Bretz that the lake could be the source of Bretz's scabland flood. Aerial photographs of Camas Prairie settled it for him: these ridges were current ripples on the old lake floor. He first presented them as Ripple marks (?) in Glacial Lake Missoula, then in 1942 published Unusual Currents in Glacial Lake Missoula, with water racing through the Eddy Narrows at an estimated 9.5 cubic miles an hour.

Where it stands

Worth the stop nearby

• CSKT Bison Range — 20 mi
  The herd the tribes saved, the government forced them to sell, and the range they finally got back.

More markers nearby

• The Flathead Indian Reservation — 26 mi
• The Mission Valley — 27 mi