Note 23 — IX. EXPLORATIONS ON THE NORTHERN SLOPES, 1881-1883 By BAILEY WILLIS
Reading edition
The terraces to which reference is here made are not the work of the sea, but of lakes whose waters gathered between the mountain slopes and retreating glaciers of the ice period. See the article by H. I. Bretz. Geol. Survey of Wash., Bull. 8, 1912.