CPAAWENCESLAU GERALDES TEIXEIRA, CPAA.2026-06-30http://hdl.handle.net/123456789/380871Some soils from the western Amazon region contain KCl-extractable Al contents 5 to 10 times greater than is typical for highly weathered soils containing predominantly kaolinite and gibbsite. We studied a soil sequence from the Brazilian western Amazon consisting of two Typic Udifluvents on the levee of the Javari River, onde Aeric Endoaquent in the backswamp, and two Typic Hapludults on an adjacent terrace.openAccessMineralogiaSoloAmazoniaArtigo de periódico