Erdenebulag coal deposit belongs to South Gobi coal-bearing basin. Coal is hosted in Middle Permian Tavantolgoi formation. As the results of exploration program, four coal seams with the thickness ranging from 0.95 m to 12.7 m in the Tulga area and five coal seams with the thickness ranging from 2.1 m to 21m in the Baga-Argalant area have been discoeverd so far.