ids ) ▁or ▁com ets ▁( cons isting ▁of ▁ice , ▁dust ▁particles ▁and ▁rock y ▁fragments ) ▁with ▁the ▁Earth . ▁For ▁er oded ▁or ▁buried ▁cr aters , ▁the ▁stated ▁diameter ▁typically ▁refers ▁to ▁the ▁best ▁available ▁estimate ▁of ▁the ▁original ▁rim ▁diameter , ▁and ▁may ▁not ▁correspond ▁to ▁present ▁surface ▁features . ▁Time ▁units ▁are ▁either ▁in ▁thousands ▁( ka ) ▁or ▁millions ▁( Ma ) ▁of ▁years . ▁ ▁Young ▁cr aters ▁( 1 0 ▁ka ▁or ▁less ) ▁Less ▁than ▁ten ▁thousand ▁years ▁old , ▁and ▁with ▁a ▁diameter ▁of ▁ ▁or ▁more . ▁The ▁E ID ▁lists ▁fewer ▁than ▁ten ▁such ▁cr aters , ▁and ▁the ▁largest ▁in ▁the ▁last ▁ 1 0 0 , 0 0 0 ▁years ▁( 1 0 0 ▁ka ) ▁is ▁the ▁ ▁Rio ▁Cu arto ▁cr ater ▁in ▁Argentina . ▁However , ▁there ▁is ▁some ▁uncertainty ▁regarding ▁its ▁orig ins ▁and ▁age , ▁with ▁some ▁sources ▁giving ▁it ▁as ▁< ▁ 1 0 ▁ka ▁while ▁the ▁E ID ▁gives ▁a ▁bro ader ▁< ▁ 1 0 0 ▁ka . ▁ ▁The ▁Ka ali ▁impact s ▁( c . ▁ 2 0 0 0 ▁BC ) ▁during ▁the ▁Nord ic ▁Bron ze ▁Age ▁may ▁have ▁influenced ▁Est onian ▁and ▁Finn ish ▁myth ology , ▁the ▁Cam po ▁del ▁C iel o ▁( c . ▁ 2 0 0 0 ▁BC ) ▁could ▁be ▁in ▁the ▁leg ends ▁of ▁some ▁Native ▁American ▁tribes , ▁while ▁Hen bury ▁( c . ▁ 2 2