Geological Survey of India (GSI), established in 1851 is a government organization in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 which is an attached office to the Ministry of Mines of Union Government of India for conducting geological

Geology

Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...

 surveys and studies. It is one of the oldest of such organizations in the world and the second oldest survey in the country. GSI is the prime provider of basic earth science information to the government, industry and the general public, as well as responsive participant in international geoscientific fora.