Submarine Fan: A submarine fan is a fan-shaped sediment deposit on the deep-sea floor+ Formation: Mainly formed by turbidity currents carrying mud, sand and other sediments downslope through submarine channels+ Structure: The principal elements of submarine fans are canyons, channels and lobes+ Bengal Fan is the world’s largest submarine fan+ Hydrocarbon Significance: Coarse sand deposited in channels can form potential oil and gas reservoirs.

Lake Mead: It is located in the Mojave Desert region+ It is the largest reservoir in the U.S by water storage capacity+ Formation: Artificial reservoir Created in the 1930s by Hoover Dam on the Colorado River+ The Colorado River forms part of the international boundary between the United States and Mexico.

Agasthyamalai Biosphere Reserve: Location: The reserve is located at the southernmost end of the Western Ghats in southern India (Tamil Nadu and Kerala)+ UNESCO MAB: It is part of the UNESCO Man and Biosphere (MAB) Programme+ Ecosystems: Composed mostly of tropical forest ecosystems+ Flora: It serves as a unique genetic reservoir for cardamom, jamun, nutmeg, pepper, and plantain+ Fauna: Diverse species of mammals, reptiles, amphibians, fishes, and birds+ Protected Zones: The area encompasses three wildlife sanctuaries (Shendurney, Peppara, and Neyyar) as well as the Kalakad Mundanthurai Tiger Reserve.