CURRENT AFFAIRS

Detailed explanation-1: -Option D Explanation: A crescent-shaped crater in Northeast China named the ‘Yilan’ Crater holds the record as the largest impact crater on Earth that formed in the last 100,000 years.

Detailed explanation-2: -Despite China’s large land area, only one impact crater-the relatively small Xiuyan crater in Liaoning province-had been discovered there prior to 2020. Then, last year, a team of geologists found another crater northwest of Yilan in Heilongjiang Province.

Detailed explanation-3: -Yilan crater is an impact crater in China. It is situated to the northwest of Yilan town in Heilongjiang province. Its southern rim has eroded. However, northern rim is visible on the surface as crescent-shaped ridge.

Detailed explanation-4: -In South Africa, the Vredefort Crater (opens in new tab), also known as the Vredefort Dome is the world’s largest known impact crater, according to NASA Earth Observatory.

Detailed explanation-5: -The Vredefort impact structure /ˈfrɪədəfɔːrt/ is the largest verified impact structure on Earth. The crater, which has since been eroded away, was around 160–300 km (100–200 mi) across when it was formed.