Douglas county in Minnesota holds a 202 lb slab of greywacke covered in runes.
Kensington is a city in Douglas County, Minnesota, United States. 
 The city is notable in Minnesota history for being the place where the famous, if questionable, Kensington Runestone was first displayed. 
The Kensington Runestone is a 202 lb slab of greywacke covered in runes on its face and side. 
