jinis
peat, lignite, sub-bituminous batu bara, bituminous batu bara, Anthracite, grafit
gandheng tuff, tuff rhyolitic, basaltic tuff, trachyte tuff, tuff andesitic lan ignimbrite.
fitur
mbantu ing produksi panas lan listrik, digunakake minangka bahan bakar fosil
tansah ditemokake minangka pipo vulkanik liwat lemah ndhuwur Continental jero