Crater With an Unfamiliar Ring?

The previous record holder for largest meteorite crater on earth used to be the Vredefort Ring (sometimes referred to as a “Dome”) in South Africa.  However, more recently, in Australia, it was discovered a huge meteorite entered the earth’s atmosphere and split into two chunks (each chunk appears to have been at least 6 miles wide) that created twin impact craters spanning nearly 250 miles across the Australian countryside.