* Terra rossa: This is a red soil that is common in the Mediterranean region. It is formed from the weathering of limestone and dolomite, and it is typically rich in iron oxides.

* Rendzina: This is a dark, fertile soil that is found in areas with a lot of limestone. It is formed from the weathering of limestone and marl, and it is typically rich in organic matter.

* Loess: This is a wind-blown soil that is found in many parts of the world. It is typically a fine-grained, silty soil that is rich in nutrients.

* Sand: This is a soil that is composed of loose, individual grains of sand. It is typically found in arid and semi-arid regions, and it is not very fertile.

* Gravel: This is a soil that is composed of loose, individual grains of gravel. It is typically found in riverbeds and other areas with a lot of running water.