The site was first visited in 1996 by Iranian researchers F. Biglari and S. Heydari-Guran and during the following four years a series of surface surveys were made at one-month intervals, which resulted in a rich collection of Middle Paleolithic lithic artifacts.

The sediments at the entrance yielded numerous animal bones, charcoal and flint tools, Middle Paleolithic artifacts, such as side-scrapers and a Mousterian point.

[2] They include a fragment of a right mandible of an adult specimen and an upper third right molar of a sub-adult ruminant, both allocated to wild Caprinae.

In 1999 an area of about 7 km2 (2.7 sq mi) including 14 caves and rock-shelters was surveyed, where Upper Palaeolithic and later lithic assemblages came to light.

Records and samples made by S. Heydari provide a paleo-environmental sequence for the region from the late Middle Pleistocene to the Holocene.