- This report from 1973 describes the geology of southern Snohomish County.
- The map area includes eighty-five square miles in South Snohomish County southeast of Everett, bounded on the west by Interstate 5, on the south by Highway 405 and the Snohomish-King County boundary, on the east and north by the Snohomish River floodplain.
- The Ghost town of Gladstone (maplewoodmn.gov)
Maplewood has its own “Ghost Town.” English Street and Frost Avenue was the center of this now vanished city. In the final years of the nineteenth century it was a very different place.