1700 ENGLAND AVE 2016-01-01 MF Import

Zx�nng Propeitl' Y�!-l1-10 Ererett, IVnsBingla� 3.2 Gcolo�ic Setting The site lies in a physiographic region Irnown as the Puget Sound Lowland. The Puget Sound Lowland consists of a linear depression which trends in a north-south direction between the Olympic Mountains to the west and the Cascade Mountains to the east. The lowland contains the majority of the Puget Sound area. During the recent geologic past, within the last 1 million years, the topography of the Puget Sound Lowland was altered by a series of glacial events originating out of the Canadian Rockies and the Northem Cascade Mountains. Deposits of at least four (4) Pleistocene aged glaciations have been identitied in the Puget Sound Lowland. The last of these glaciations has been named the Fraser, and includes two recognized glacial advances (stades) separated by an interstade. The younger stade of the Fraser glaciation is the Sumas, while the older is the Vaslion. Deposits of the Vashon stade are present in the project area. This event, the Vashon stade, covered most of the Puget Sound Lowland and the project site with up to 3,000 feet of glacial ice from appro�:imately 18,000 to 13,000 years ago. This glacial event altered the topography of the Puget Sound Lowland and the project area to resemble its present configuration. As a result of these glacial events, most of the surficial and/or near surficial soil types encountered within the Puget Sound Lowland are derived from or direcdy associated with glaciation. Surficial soil mapped in the immediate project area by 4 GES, /�ic. k-`