The Tal Chappar sanctuary is located on the fringe of the Great Indian Desert. Tal Chappar nestles a unique refuge of the most elegant Antelope encountered in India, "the Black buck". Tal Chapper sanctuary, with almost flat tract and interspersed shallow low lying areas, has open grassland with scattered Acacia and prosopis trees which give it an appearance of a typical Savanna. The word "Tal" means plane land. The rain water flows through shallow low lying areas and collect in the small seasonal water ponds.

The Geology of the zone is obscured by the wind blown over-burden. Some small hillocks and exposed rocks of slate and quartzite are found in the western side of the sanctuary. Area between hillocks and the sanctuary constitutes the watershed area of the sanctuary. The whole sanctuary used to be flooded by water during the heavy rains but with salt mining going on in the watershed. Hardly any rain water falling on the hillocks reach the Sanctuary.

The Tal Chapper sanctuary lies in the Sujangarh Tehsil of Churu District, Situated in the North-East part of Rajasthan. It lies on Nokha- Sujangarh state Highway and is situated at a distance of 85 KM from Churu & about 132 Km from Bikaner. The nearest Railway station is Chapper which lies on Degana - Churu - Rewari metre gauge line of Northen Western Railways.