Adobe

DEF: Sun-dried clay brick.

EX: San Pedro de Atacama is a town in Chile where everything is built in adobe.

Merriam-Webster Online Dictionary
adobe (noun)
1.
a brick or building material of sun-dried earth and straw
2.
a structure made of adobe bricks
3.
a heavy clay used in making adobe bricks , broadly alluvial or playa clay in desert or arid regions