The ocean-floor of the Indian Ocean is divided by spreading ridges and crisscrossed by aseismic structures

This distinctive physical map of the Indian Ocean floor appeared in the October 1967 issue of National Geographic. The detail of such submarine terrain as continental shelves, basins, fracture zones and the mighty Mid-Oceanic Ridge is stunning.

Mar 20, 2025 · The ridges form an inverted Y on the ocean floor, starting in the upper northwest with the Carlsberg Ridge in the Arabian Sea, turning due south past the Chagos-Laccadive Plateau, and becoming the Mid-Indian (or Central Indian) Ridge.

Mar 19, 2025 · Indian Ocean sea floor: FAO map of world fishing regions; used with permission.

Jun 7, 2022 · The Indian Ocean basin is the world’s third-largest ocean after the Pacific and Atlantic, covering about 20% of the Earth’s surface. Its area is roughly 5.5 times the size of the USA. Without its marginal seas, the Indian Ocean basin has an area of about 70,560,000 square km (27,243,000 square mi).

They charted ocean floors around the world for National Geographic between 1967 and 1975. Both the 1967 National Geographic Indian Ocean Map and a 1975 Antarctic Region Map can be found in the Map Collection in the library.

Indian Ocean Floor. Map provided by David Rumsey. Author is Berann, Heinrich and published by National Geographic Society in 1967. The easy-to-use getaway to historical maps in libraries around the world..

Mar 20, 2025 · South of and beneath the Antarctic Convergence (roughly 50° S), another highly productive area, are diatomaceous algal oozes. Sediments are absent over a width of about 45 miles (70 km) on the oceanic ridge crests, and the flanks are only sparsely covered. The ocean floor is composed of basalt in various stages of alteration.

Mar 19, 2025 · This map of seafloor features like abyssal hills in the Indian Ocean is based on sea surface height data from the SWOT satellite. Purple denotes regions that are lower relative to higher areas like abyssal hills, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.

This distinctive physical map of the Indian Ocean floor appeared in the October 1967 issue of National Geographic. The detail of such submarine terrain as continental shelves, basins, fracture zones and the mighty Mid-Oceanic Ridge is stunning.