- Siliceous rock (Wikipedia)
Siliceous rocks are sedimentary rocks that have silica (SiO2) as the principal constituent. The most common siliceous rock is chert; other types include diatomite. They commonly form from silica-secreting organisms such as radiolarians, diatoms, or some types of sponges.
- Mount Erie (Washington) (Wikipedia)
Mount Erie is a mountain on Fidalgo Island in Skagit County, Washington, United States. It is on public park land owned and managed by the city of Anacortes and is located in the south of the Anacortes Community Forest Lands.