Simple Lithology

residual material

definition Material of composite origin resulting from weathering processes at the Earth's surface, with genesis dominated by removal of chemical constituents by aqueous leaching. Miinor clastic, chemical, or organic input may also contribute. Consolidation state is not inherent in definition, but typically material is unconsolidated or weakly consolidated. more like this
source This vocabulary more like this
broader material formed in surficial environment
narrower residual material
in scheme simplelithology
is primary topic of residual material