Let us take a closer look at the mounds. Though they vary in size and shape, all are made of earth, which was transported in baskets to the mound construction sites.
Kaut arī uzkalni izmēru un formas ziņā ir ļoti atšķirīgi, tie visi ir veidoti no zemes, kas līdz celtniecības vietai tika atgādāta grozos.