Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite
Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite
Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone