Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A shekara ta 2006 wata ƙungiyar masu bincike da Ralph von Frese da Laramie Potts ke jagoranta sun yi amfani da ma'aunin nauyi ta tauraron dan adam na NASA GRACE don gano ramin Wilkes Land mai nisan mil 300, wanda wataƙila ya samo asali kimanin shekaru miliyan 250 da suka gabata.  Tambaya: Yaya tsawon lokacin da aka kafa craters?
Shekaru miliyan 250 da suka wuce.