The Dharwar Craton is the oldest geological formation in India, dating back to the Archean Eon (3.8 billion years ago).

The Aravalli Range is composed primarily of gneiss and schist, which are metamorphic rocks formed from the transformation of pre-existing rocks under high temperature and pressure.

The Ganga River Basin is the largest river basin in India, covering an area of approximately 1.1 million square kilometers.

The Deccan Plateau is composed primarily of basalt and lava, which were formed by volcanic eruptions during the Cretaceous period.

The Ganga-Brahmaputra Alluvial Aquifer is the largest aquifer in India, covering an area of approximately 1.7 million square kilometers.

The Himalayan Mountains are composed of a variety of rock types, including sedimentary rocks, metamorphic rocks, and igneous rocks.

The Siachen Glacier is the largest glacier in India, located in the Karakoram Range of the Himalayas.

The Thar Desert is composed primarily of sandstone and limestone, which were deposited by ancient rivers and seas.

Wular Lake is the largest freshwater lake in India, located in the state of Jammu and Kashmir.

The Sunderbans is a delta formed by the Ganga and Brahmaputra rivers in the state of West Bengal.

Jog Falls is the largest waterfall in India, located in the state of Karnataka.

The Konkan Coast is composed primarily of basalt and lava, which were formed by volcanic eruptions during the Cretaceous period.

The Ganga River is the largest river in India, flowing for a distance of approximately 2,525 kilometers.

The Chhotanagpur Plateau is composed primarily of gneiss and schist, which are metamorphic rocks formed from the transformation of pre-existing rocks under high temperature and pressure.

The Ganga-Brahmaputra Delta is the largest delta in India, covering an area of approximately 105,000 square kilometers.