notional 3d cross-section dry flat desert with dunes and with aquifer at the bottom
notional 3d cross-section dry flat desert with dunes and with aquifer at the bottom
notional 3d cross-section dry flat desert with dunes and with aquifer at the bottom
an illustration of the layers of a geological formation
a diagram of the layers of the earth
an illustration of the layers of the earth
an illustration of a desert with cactus and water