Glauconite from Ecuador
Ecuador | |
| Duque, Pablo (2000): Breve lexico Estatigrafico del Ecuador. Sistema de Informacion Geológica y Minera (SIM), 75 p :19 |
| Ordoñez, Marta (2006): MICROPALEONTOLOGÍA ECUATORIANA. CIGG: PETROPRODUCCION. p :95,96,97. |
Alejandro Felix | |
| Manrique, J., Guaman, G., & Guartan, J. (2018). Geochemical Prospecting Study of the Vanadium-Uranium Mineralization of Puyango, Ecuador (No. IAEA-CN--261). |
| Alejandro Félix collection. |
Faculty of Natural Science construction site, Guayaquil, Guayaquil Canton, Guayas Province, Ecuador