Leaning Tower of Pisa good under the soil layers of different materials, all kinds of soft silt sediment and the clay is very soft and white form, and in about one meter deep is the local aquifers.

• 比萨斜塔下的有好几层不同材质的土层，各种软质粉土的沉淀物和非常软的粘土相间形成，而在深约一米的地方则是地下水层。