Summary:
The natural sandstone cave system is the longest in the world and dates back to at least 70 million years. Sandstone caves are not as common as limestone caves because of the high solubility of sandstone, making it erode and dissolve much more easily than limestone.For full report, log on to www.timesofindia.com "We have about 1,700 caves in Meghalaya as of now and over a 1,000 of them have been explored. SHILLIONG: The mists and mountains aside, Meghalaya 's uniqueness lies in the mystery of its caves . Some of them have been explored and mapped..