FORMATION OF ERENKOY MAGNESITE DEPOSITS, ESKISEHIR, WESTERN TURKEY: AN INITIAL STUDY
GENERAL CHARACTERISTICS OF LOW RANK COAL OCCURRENCES IN BIGA PENINSULA, TURKEY
GENERAL ASPECT OF DIFFERENT BARITE OCCURRENCES IN THE EAST OF ISTANBUL, TURKEY
THE PRELIMINARY INVESTIGATION OF CAYIRHAN GLAUBERITE MINERALLIZATION IN ANKARA, TURKEY