The Paja Formation is known for its gypsum deposits, which are mined and restricted to Santander.Royero & Clavijo, 2001, p.60 Near Guavatá, the formation hosts sphalerite and malachite and near Otanche, pyrite and galena are found in the formation.Sarmiento Rojas, 2002, p.65 In Gámbita, the Paja Formation contains pyrite, galena and chalcopyrite.Sarmiento Rojas, 2002, p.66 Other minerals occurring in the Paja Formation, are lead and zinc, around Paime and Yacopí, Cundinamarca.Acosta & Ulloa, 2002, p.75
