建材として販売されるラテライト　Laterite for sale as a construction material

Eiji Matsumoto, on June 5, 2007, said:

The laterite, a concretion of iron oxides formed in tropical soils, is an important construction material for people in the estuary region of the Amazon, because it is difficult to get hard rocks or gravels nearby. (July 28, 1993, at the port of Abaetetuba, Pará)

paganelli, on December 11, 2008, said:

A 'pedra dura' (=laterite) continua sendo o material mais usado na construção dos alicerces das casas populares de um ou, no máximo, dois andares.