Unknown2019-04-052019-04-051966-03EPM-074-07-013http://hdl.handle.net/20.500.11867/161014 sheets 11.5 x 9 inch, bi-folded and secured booklet style. Printed recto and verso.Issued by the Washington State Parks and Recreation Commission. Gives the geological origin and Indian history of the rock, as well as its tie to Lewis and Clark.MapLewis and Clark expedition