The late Prof. Dr. Antonio de Barros Machado, Director of the Dundo Museum of Zoology and Anthropology in Angola (1947-1974) studied during more than 30 years of intense work (until 2003 in Portugal, Oeiras)  a great number of laterite and bauxite rock samples, in his opinion molded by termite activity in geologic times. He analyzed laterite and bauxite rocks  from many places on Earth. His results were only partially recognized because they put into question the "sedimentary origin" of theses formations. I have been dealing with his heritage and am ready to bridge important data for interested colleagues.   Grasset mentions in his double volumed encyclopedia part, dedicated to termites, that he never had met more convincing arguments as to the origin of these rocks then those of Barros Machado, though in his first approach, documented in the earlier Zoology encyclopedia, he was not yet convinced, but then surrendered to the smashing amount of proof, proposed by Barros Machado.

In the collection of private letters, there were more geology scientists to accept this innovating idea, but it still remains controverse. 

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