- Shale (Wikipedia)
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2Si2O5(OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. Shale is characterized by its tendency to split into thin layers (laminae) less than one centimeter in thickness. This property is called fissility. Shale is the most common sedimentary rock.
- Burnsville, Minnesota (Wikipedia)
Burnsville (/ˈbɜːrnzvɪl/ BURNZ-vil) is a city 15 miles (24 km) south of downtown Minneapolis in Dakota County, Minnesota. The city is situated on a bluff overlooking the south bank of the Minnesota River, upstream from its confluence with the Mississippi River. Burnsville and nearby suburbs form the southern portion of Minneapolis–Saint Paul, the 16th-largest metropolitan area in the United States, with about 3.7 million residents. At the 2020 census the population was 64,317.