[4] With the formation of the United State of Rajasthan in 1948, parts of the erstwhile district of Girwa, Khamnor, Rajnagar, Bhim, Magra, Kherwara and Kumbhalgarh, together with the thikanas of Nathdwara, Kankroli, Salumbar (excluding Sayra tehsil), Bhinder, Kanor, Bansi, Bari Sadri, Amet, Sardargarh, Deogarh and Gogunda were combined to constitute the district of Udaipur.[8] The district is characterized by hilly terrain, with hills in the west and south, an elevated plateau in the north, and plains in the east.[9] According to the 2011 census Udaipur district has a population of 3,068,420,[1] roughly equal to the nation of Oman[14] or the US state of Iowa.[18] Udaipur district comprises Fifteen sub-divisions: Sarada, Girwa, Gogunda, Badgaon, Kherwara, Bhinder, Lasadiya, Mavli, Vallabhnagar, Kotra, Jhadol, Rishabhdev and Salumbar.[2] The important metallic minerals found in the district are ore of copper, lead, zinc and silver.[2] Important non-metallic minerals found in the district are rock phosphate, asbestos, limestone, and marble.