Also the second largest impact structure on Earth, the 1.85 billion years old Sudbury crater in Canada, hosts world-class mineral deposits - in this case nickel-rich minerals that were melted and concentrated by the extreme heating caused by the impact.
The circumference of Earth at the equator is about 24,902 miles (40,075 km), but from pole-to-pole â the meridional circumference â Earth is only 24,860 miles (40,008 km) around. This shape, caused by the flattening at the poles, is called an oblate spheroid.
The width of the Earth â its diameter at the equator â is 7,926 miles. Because the Earth is not a perfect sphere, the measurement of the planet from North Pole to South Pole is slightly less: 7,900 miles. The Earth's average radius is 3,959 miles. Keep Learning.