Colour guide to paleosols

buried soils ciencia del suelo color colour couleur estructura del suelo fotografia geochemistry geochimie geologia geologie geology methode methodology methods minerales minerals muestreo palaeosolic soil types palaeosols paleosoles photographie photography sampling sciences du sol soil soil morphological features soil sciences soil structure sol sol enfoui structure du sol suelo suelo enterrado trait morphologique du sol weathering