It is big wild thyme with over 1000 meters high, 250 sq km, and 100-200m deep and 10km wide at the end of it. It is located on the north of the Gurvantes soum of Ummugobi. It has`t well studied yet. However new remains of ancient animals can be find the Bugiin Tsav is 50km far from KHermen tsav. Dinosaur skeleton of Mesolithic era was found from here has in the Nature Historical Museum.