With the participation of the Governor of Sonora, Guillermo Padrés; the General Coordinator of Mining Jimena Valverde and the General Director of the Mexican Geological Service, Dr. Rafael Alexandri; the "First Seminar on Dimensionable Rocks" was held in the city of Hermosillo, Sonora. During the opening ceremony, Rafael Alexandri, in his speech, emphasized that Mexico has an enormous potential…