Most of Sikkim, including Gangtok, is underlain by Precambrian rocks which contains foliated phyllites and schists; slopes are therefore prone to frequent landslides.Surface runoff of water by natural streams (jhora) and man-made drains has contributed to the risk of landslides Pelling is a town in the district of West Sikkim, India. Pelling is nestled at an altitude of 2,150 m (7,200 feet). The town is located at a distance of 10 km from the district headquarters of Geyzing. A regular bus service connects the two towns. However with the influx of tourists, the region is undergoing a metamorphosis, with the roads being repaired and hotels being set up.