Blanchard Mountain was once covered in a massive sandstone deposit called the Chuckanut Formation. Over time, this sandstone unit grew to be more than 10,000 feet thick, trapping many fossils of ancient plant and animal species.

geology of

Victory Heights, Seattle (Wikipedia) Victory Heights is a neighborhood in the Lake City district of Seattle, Washington. It was named after the Victory Highway, which formed the eastern border of the area. The highway was originally called the Gerhart Erickson Road, the namesake of which was Gerhart Erickson, who sponsored the Good Roads legislation in 1903. The road was then renamed Bothell Road, changed to Victory Highway in 1924, before returning to Bothell Road; it is now called Lake City Way NE. The neighborhood was annexed to the city of Seattle in 1954.

Oyster Dome (wa100.dnr.wa.gov) Take an invigorating hike up Blanchard Mountain, located south of Lake Samish, to the geologic treasure known as Oyster Dome—a rounded, rocky promontory with spectacular views of the San Juan Islands and the Olympic Mountains. Oyster dome is located in the 4,500-acre Blanchard State Forest, the only place in Washington where the Cascade Mountains meet the Salish Sea.