- Geologic Map of the East Half of the Bellevue South 7.5’ x 15’ Quadrangle, Issaquah Area, King County, Washington
The Issaquah area includes several of the most outstanding geologic features of the eastern Puget Lowland region. Folds have warped thousands of meters of Tertiary sedimentary and volcanic rocks. Several hundred meters of both glacial and postglacial sediment have accumulated in a deep glacial trough, which is now partly occupied by Lake Sammamish but which was previously the conduit for massive volumes of meltwater during ice-sheet occupation and retreat. The eastern projection of an east-west-oriented crustal structure, which reflects Tertiary through Holocene fault displacement, extends across the eastern part of the map area.
- Seattle Neighborhoods: Madison Park — Thumbnail History (historylink.org)
The Madison Park neighborhood of Seattle is situated on the western shore of Lake Washington. The Duwamish peoples who originally inhabited it called it “Where One Chops.” The Duwamish shared the forested banks, swamps, and inlets with bear, deer, otter, and mink. After Seattle was founded in the 1850s, Madison Park became a favorite picnic and recreational area. Judge John J. McGilvra (1827-1903), the area’s first developer, purchased land and opened Madison Street at his own expense in 1864-1865. Today Madison Park is an affluent, end-of-the-carline residential district on Lake Washington which has a small, elegant shopping area.
- Lake Sammamish (Wikipedia)
Lake Sammamish is a freshwater lake 8 miles (13 km) east of Seattle in King County, Washington, United States. The lake is 7 miles (11 km) long and 1.5 miles (2 km) wide, with a maximum depth of 105 feet (32 m) and a surface area of 8 sq mi (21 km2). It lies east of Lake Washington and west of the Sammamish Plateau, and stretches from Issaquah in the south to Redmond in the north. At Issaquah it is fed by Issaquah Creek, and at Redmond it drains to Lake Washington via the Sammamish River, named after the native people who once lived along its entire length.
