Geological Survey of India (GSI)

An agency set up to find coal for colonial railways now hunts for the lithium powering electric cars. It just got its first woman chief in 176 years.

MCQ Questions

Geological Survey of India

1851

GSI is India’s premier national geoscientific agency

Continuous working era began 4 March 1851, under first Director Sir Thomas Oldham.

98%+ Mapped

Systematic Mapping

Coverage of India’s total mappable area.

54th Director General

First Woman, 176 Years

Varsha Ashok Aglawe, assumed charge 31 July 2026.

Critical Minerals

Lithium, REE, Copper, Cobalt

A growing focus of exploration work.

Ministry of Mines

Attached Office

India’s premier national geoscientific agency.

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📑 Contents

1Must Know
2Good to Know
3Test Yourself
4Great to Know
5Current Affairs

Must Know

The Geological Survey of India (GSI) is India’s premier national geoscientific agency. It functions as an attached office under the Ministry of Mines.
GSI’s continuous working era began on 4 March 1851, with Sir Thomas Oldham as its first Director. It was originally set up to locate coal deposits for India’s expanding railway network, in the same Gondwana coal fields covered in IndGeo0055 — Gondwanaland and the Gondwana Rock System.
The term “Geological Survey of India” was first used in an 1848 report by John McClelland. Early coal investigations date back to 1836, under the East India Company.
GSI’s core functions include geological mapping, mineral exploration, natural hazard studies, and geotechnical and geo-environmental studies.
Systematic Geological Mapping (SGM) is GSI’s most important mapping programme. It has covered over 98% of India’s total mappable area.

Good to Know

GSI’s mineral-exploration work increasingly focuses on deep-seated and critical minerals: lithium, rare earth elements, copper, and cobalt. This builds on the broader picture in IndGeo0008 — Mineral Resource Distribution in India.
Its natural-hazard work includes seismotectonic studies, glaciology, climate-change geostudies, and hazard assessments for landslides, tsunamis, and floods.
GSI also conducts palaeontological research. Its fossil and rock-formation studies help reconstruct India’s deep geological and biological history.
GSI’s geotechnical and geo-environmental studies support infrastructure planning, land-stability assessment, and groundwater studies.

Test Yourself

Great to Know

GSI’s founding mission, finding coal for the railways, reflects colonial India’s own infrastructure priorities. Its mandate has since expanded far beyond that original brief.
GSI’s shift toward critical minerals like lithium and rare earth elements mirrors a global race. These minerals are essential for batteries, electronics, and clean-energy technology. Its exploration work directly feeds the block auctions covered in IndEco0175 — Critical and Strategic Minerals in India.
GSI’s founding predates India’s independence by nearly a century. It is one of the world’s oldest continuously operating geological survey organisations.
GSI’s work sits at the intersection of pure science and applied policy. The same geological data that maps ancient rock formations also guides where new mines, dams, and highways can safely be built.

Current Affairs

On 31 July 2026, Varsha Ashok Aglawe assumed charge as the 54th Director General of GSI. She became the first woman to lead the organisation in its 176-year history.
She succeeded Asit Saha, who served as Director General from 27 July 2024 to 31 July 2026.
Aglawe joined GSI in 1992, after earlier serving with the Indian Bureau of Mines. She has held senior positions across GSI’s Central, Northern, and Eastern Regions, and at its Central Headquarters.
She is a specialist in palaeontology and palynology. Her research covers the Late Cretaceous-Palaeocene boundary and the Satpura-Gondwana basins.
Aglawe identified the Salbardi-Ghorpend area, in Betul district, Madhya Pradesh, as a dinosaur nesting site. It preserves Upper Cretaceous dinosaur eggs, and her work there advanced the understanding of dinosaur distribution on the Indian subcontinent.
On 4 August 2026, C-DAC and GSI signed an Umbrella MoU, at Electronics Niketan, New Delhi. It aims to strengthen geoscience, mineral exploration, and disaster management, using next-generation technologies. (Source: PIB)
The partnership combines C-DAC’s High-Performance Computing with GSI’s geological expertise. Planned uses include high-resolution 3D subsurface mapping, and predictive modelling for mineral targeting. It will also convert decades of unstructured geological records, into a domain-specific Large Language Model. (Source: PIB)
On disaster mitigation, the MoU covers slope-scale landslide monitoring, using Synthetic Aperture Radar. It also supports early-warning systems, and studies on Glacier Lake Outburst Floods. A further goal is accelerating the discovery of critical minerals and Rare Earth Elements. (Source: PIB)