Is it lost if it is "flattening higher points in a field and filling in the hollows"? Something I've noticed where I am - we have a perpetual harvest of stones

Is it lost if it is "flattening higher points in a field and filling in the hollows"? Something I've noticed where I am - we have a perpetual harvest of stones. My working theory is that smaller particles sink filling in small voids around buried rocks and with rain & frost this causes the stones to eventual rise to the surface. This has the appearance of losing soil but it's really just sunk.