- 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.
- Fenelon Place Elevator (Wikipedia)
The Fenelon Place Elevator (also known as the Fourth Street Elevator) is a 3 ft (914 mm) narrow gauge funicular railway located in Dubuque, Iowa, United States. It was listed in the National Register of Historic Places in 1978. It was included as a contributing property in the Cathedral Historic District in 1985, and in the Fenelon Place Residential Historic District in 2015.
