Thar Desert view the fragile and beautiful ecosystem of the Thar desert. This form of tourism provides income to many operators and camel owners in Jaisalmer as well as employment for many camel trekkers in the desert villages nearby. People from various parts of the world come to see the Pushkar ka Mela (Pushkar Fair) and oases. Rajasthan is pre-eminent in quarrying and mining in India. The Taj Mahal was built with white marble mined from Makrana in Nagaur district. The state is the second largest source of cement in India. It has rich salt deposits at Sambhar. Jodhpur sandstone is mostly
Geological Survey of Pakistan notably carried out an ingenious work on nuclear geology and geography as part of the clandestine atomic bomb project, and played an integral role in the selection of the test sites. Throughout this time, the GSP's scientists continued exploring uranium and plutonium, as well as other material sources in all over the country. In 1992, The GSP announced the discovery of the huge deposits of coal at Thar Desert in Sindh. The GSP sponsored and published various studies on the geology of Thar Desert. In the 1990s, the GSP issued and produced several maps of atlas of Pakistan, with mapping