ARCILLAS IDENTIFICADAS EN SUELOS DE COSTA RICA A NIVEL GENERALIZADO DURANTE EL PERÍODO 1931-2014: II. MINERALOGÍA DE ARCILLAS EN SUELOS CON CARACTERÍSTICAS VÉRTICAS Y OXÍDICO CAOLINÍTICAS.

This paper summarizes available information on soil clay mineralogy in topsoils of Costa Rica, including clay minerals described in B horizons when significantly different from predominant mineralogy in the topsoil. The soil clay suites ("predominant clay groups") emphasized are grouped as: (1) smectites and interstratified clays (Vertisols and other soils with vertic properties), and (2) oxides-hidroxides-oxihidroxides-kaolinite-gibbsite (in Alfisols, Ultisols and Oxisols). The soil clay genesis of these dominant groups is discussed when enough information is available. [ABSTRACT FROM AUTHOR]