Cheddar Complex the Pleistocene period. Cheddar Caves contain both active and fossil systems. The active cave system is one of the most heavily studied karst systems in Britain with reference to the conduit and diffuse flow characteristics of its hydrology. Charterhouse Caves include four major swallet caves that provide an indisputable record of Pleistocene landform development in the Mendips and surrounding area. Sun Hole Cave provides a varied fauna radiocarbon-dated to the end of the Late Devensian Cold Stage. Several types of limestone including Clifton Down Limestone, Cheddar Limestone and Cheddar Oolite are visible in the Gorge and surrounding areas with pale
Udayagiri and Khandagiri Caves hill (Udayagiri). Marshall has counted more than 35 caves in both the hills, while M.M. Ganguli has enumerated only 27 caves. The number of existing caves at Udayagiri is 18, while Khandagiri has 15. The local names of the existing caves are listed below, numbered according to the enumeration of the Archaeological Survey of India. In Udayagiri, Hathigumpha (cave 14) and Ganeshagumpha (cave 10) are especially well known due to art treasures of their sculptures and reliefs as well as due to their historical importance. "Raninka Na'ara" (Queen's Palace cave, cave 1) is also an extensively carved cave and elaborately