Terra rossa (soil)
(重定向自Terra Rossa)
Terra rossa ( Italian for "red soil") is a type of red clay soil produced by the weathering of limestone. When limestone weathers, the clay contained in the rocks is left behind, along with any other non-soluble rock material. Under oxidizing conditions, when the soils are above the water table, iron oxide (rust) forms in the clay. This gives it a characteristic red to orange colour.