Types
Features
Monuments
Famous Monuments
Sculpture
Famous Sculptures
Pictographs
Petroglyphs
Figurines
Fossils
Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale
Easily splits into thin plates, Generally rough to touch, Very fine grained rock
Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone