CURRENT AFFAIRS

Detailed explanation-1: -Marie Tharp was a pioneering American geologist and oceanographic cartographer who helped create the first scientific map of the Atlantic Ocean floor.

Detailed explanation-2: -Marie Tharp (July 30, 1920 – August 23, 2006) was an American geologist and oceanographic cartographer. In the 1950s, she collaborated with geologist Bruce Heezen to produce the first scientific map of the Atlantic Ocean floor.

Detailed explanation-3: -USGS maps the seafloor to identify and characterize habitats such as mesophotic coral ecosystems, deepwater coral ecosystems, deep-ocean environments, and more.

Detailed explanation-4: -Tharp and Heezen began mapping the individual ocean floors in 1952, but found obstacles in their way.

Detailed explanation-5: -Over time, her maps revealed the existence of the mid-ocean ridges, a series of mountain ranges that extend over 40,000 miles around the globe. In 1977, Tharp and Heezen published the first complete world map of the ocean floors.