Puget Sound faults about 1100 years ago (AD 900—930) an earthquake of magnitude 7+ uplifted Restoration Point and Alki Point, dropped West Point (the three white triangles in the Seattle Basin on the map), caused rockslides in the Olympics, landslides into Lake Washington, and a tsunami on Puget Sound. It extends as far east as (and probably terminates at) the Rattlesnake Mountain Fault Zone (RMFZ; the southern extension of the SWIF) near Fall City. This seems geologically reasonable, as both the SWIF and RMFZ appear to be the contact between Tertiary Crescent Formation basement of Puget Sound on the west and the older
Puget Sound Navigation Company Puget Sound Navigation Company The Puget Sound Navigation Company (PSNC) was founded by Charles E. Peabody in 1898. It operated a fleet of steamboats and ferries on Puget Sound in Washington and the Georgia Strait in British Columbia. Known colloquially as the Black Ball Line, the PSNC achieved a "virtual monopoly" on cross-sound traffic in the 1930s and competed with the Canadian Pacific Railway's steamships on several routes. Before 1927, when the company was controlled by Joshua Green, the house flag consisted of a design by Mrs. Green, a red star on a white diamond on a blue background. After