The walls were laid with diamond-shaped limestone blocks known as tufa. Experts noted that the architect had organized the tufa in a net-like ornamental pattern. Researchers claimed that the ...

Tufa mounds are formed when heated water rises from deep within the Earth’s crust. As water passes through layers of limestone and silt, minerals are carried to the surface where they harden ...

It gets a bit darker over here. Dr Tom Challands: Here on the face of the limestone surface, we have this white, crusty deposit, and this is a tufa deposit. It's formed by the reprecipitation of ...