Also may participate influences of presence of various forms archaeological remains (not only cropmarks), that are located underground, as well as geological elements and anomalies.
Din maaaring MAKILAHOK nakakaimpluwensya ng pagkakaroon ng iba't-ibang mga form Archaeological nananatiling (hindi lamang cropmarks) Iyon ay matatagpuan sa underground, pati na rin ang mga elemento at geological anomalya.