Part 1: History of Kashmir (Pre-historic & Neolithic)
Pre-Historic era – Ice Age
Excavations conducted by ASI in 1969 have discovered the occurrence of the Ice Age in the valley. The chief Geological formation of the ice age here are the lacustrine deposits called the ” Karewas “.
Karewa formation is of the Plio-Pleistocene age. In Kashmiri dialect, Karewa or Wudars means, “elevated table-land.”
These deposits have good quality soil mix and very useful agricultural and horticulture activities especially Zaffran (Saffron)

Ancient legends and popular traditions say that Samdimat Nagar, the capital of the kingdom of Sundra Sena, was submerged as a result of an earthquake, and the water that filled the area formed the Wular Lake, creating the largest freshwater lake in India. As per Wikipedia “it was said that during the winter months, at low water the ruins of the submerged idol temple might be seen rising from the lake“.
When the whole Valley of Kashmir was under water Shankaracharya hill was the first piece of dry land lying in the form of an igneous island. The oldest igneous rocks are still found there.
source – http://ikashmir.net/geography/
Oldest supernova found in 5,000-year-old rock carving in Kashmir

source – https://www.hindustantimes.com/india-news/oldest-supernova-found-in-5-000-year-old-rock-carving-in-kashmir/story-IrxEo1RLiFvVNvNHxDDOfI.html
Neolithic culture – Stone Age – 2000BC
The neolithic culture is indicated by the discovery of ground and polished stone axes, hoes, pestles, and bone implements at the well-known menhir site of Burzahom, ten miles east of, Srinagar.

all the photos are taken from the internet