The other attraction of the park, which has attracted tourist, is the Lal Bagh Rock, which is one of the oldest rock formations on earth. This monument has been erected by the Geological Survey of India on the Lal Bagh hill which is made up of 3000 million year old Peninsular Gneissic rocks. One of the four cardinal towers erected by Kemepgowda II, also a major tourist attraction, is seen above this hillock. This monument is over a typical exposure of peninsular gneiss, a geological term for complex mixture of granitic rocks extensively developed in peninsular India. The peninsular gneiss is among the oldest rocks of the earth dating back to 3000 million years. The antiquity of these rocks has attracted geologists all over the world and has given rise to erudite scientific papers on the evolution of the earth by the pioneers of the Mysore geological department, geological survey of India and scholars from the academy. Stone quarry of this gneiss still continues to be an endless source material for research in the various branches of earth science.