Small mines have worked to extract galena and smithsonite from the Jurassic Bikfaya Formation in southern Bekaa and on the southern slope of Mount Hermon. Hematite and limonite are found in Upper Jurassic and Lower Cretaceous units near Mount Lebanon and the associated Marjaba mines yielded tens of thousands of tons of iron oxides between 1953 and 1955. Lignite deposits in the Chouf Sandstone Formation have occasionally been mined, but they are poor quality due to high sulfur content due to pyrite.