It is clear that the structural material is earth construction, but the type of construction is unknown. The structural material may be hidden, such as in the case of a plastered earth wall, or information about it is unavailable.

ET99_India_Rawal_1

It is difficult to identify type of earthen construction when the walls are covered with plaster, like in this example of cob construction in India (People in Centre)

ET99_Chile_Brzev_1

Older low-rise masonry buildings in Chile are of adobe construction (see the exposed portion of the wall); adobe is NOT considered to be an earthen construction (it is a masonry construction technology) (S. Brzev)

ET99_Peru_Brzev_1

Many buildings in Peru are of adobe construction; adobe is NOT considered as earthen construction (it is a masonry construction technology) (S. Brzev)