Craters are formed when a meteorite, asteroid or comet hits a planet. Impact craters on earth are erased continuously by erosion or tectonically changing over time. However, almost 170 terrestrial impact craters have been identified on our planet. They are approximately 300 km in diameter and have a history of more than two billion years.
Vredefort Crater takes the first place among the largest known craters in the world. This crater is located in the Free State area of South Africa, with an estimated asteroid impact history dating back 2 billion years. The Vredefort Crater, also known as the Vredefort Dome, is the largest crater in the world. It has an estimated radius of 118 miles (190 km). At the same time this crater was declared a UNESCO World Heritage Site in 2005.
Other Large Craters
Sudbury Basin is the second largest crater in the world. This crater basin is located in Ontario, Canada, with an estimated asteroid impact date dating back to 1.8 billion years ago. The Sudbury Basin is considered one of the largest impact structures in the world, with an estimated length of 81 miles (130 km). It is also one of the oldest known impact structures around the world. Other known large craters include the Acraman Crater. It is found in South Australia with an estimated asteroid impact date dating back 580 million years. The estimated diameter of this crater currently in Lake Acraman is 56 miles (90 kilometers).
Woodleigh Crater is one of the largest known craters in the world and its asteroid impact date is estimated to be 364 million years ago. Diameter reports range from 25 to 75 miles (40 to 120 km).