Editing Nainital (section)

=== Geology ===
The [[Krol]] group of rocks, comprising [[slate]]s, [[marls]], [[sandstones]], [[limestones]] and [[dolomites]] with a few small dykes intrusives, is the dominant geological formation of Nainital's surroundings, although, [[Nodule (geology)|Nodules]], [[Lamination (geology)|laminae]] and [[Stringer (slag)|stringers]] of phosphatic material, followed upward by the purple-green shales intercalated with muddy fine-grained sandstone and siltstone; recognised as the Tal Formation; are also prevalent. The region has a complex geological framework; the rocks are fragile and newly formed. The town is completely located in the catchment area of the Nainital lake, which has highly folded and faulted rocks due to polyphase deformation.

[[Landslides]] are a frequent occurrence in the hill slopes surrounding the lake, which are steep. The slopes are highly vulnerable to landslides and mass movement due to various geological and human factors. The first known landslip occurred in Nainital in 1866 on Alma hill, and in 1879 there was a larger one at the same spot. The greatest landslide in Nainital occurred on 18 September 1880, on the slope which rising from the north of the flats ends at Alma peak, and resulted in 151 people being buried under the debris.<ref>{{harvnb|Murphy|1906|p=37}}</ref> Another heavy landslip occurred on 17 August 1898 outside the Nainital valley.<ref>{{harvnb|Murphy|1906|p=42}}</ref>

[[File:Naini Peak in Winters.jpg|thumb|Forest in Nainital after snowfall (2020)]]