Scientists have no idea what the heck they are or how they're formed, but their nicknamed Ferry Circle More scientific explanations, however, includes sand termites, which have been found in and around most of them, or else as a result of underground moisture competition among grasses.
科學家們不知道它們到底是什麼,也不知道它們是如何形成的,但它們的綽號渡輪圈更多的科學解釋,然而,包括沙白蟻,在它們的大部分和周圍都發現了沙白蟻,否則就是草叢中地下水分競爭的結果。