1. Plural of eluvium; weathered rock material and minerals that remain at or near the surface after chemical weathering, without having been transported.
Usage: geology; technical term; often used in soil science and mineralogy

Examples

• The eluvia in this region contain valuable mineral deposits formed by in-place weathering.
• Geologists studied the eluvia to understand the chemical composition of the parent rock.
• Unlike alluvium, eluvia have not been moved by water or other erosional forces.
• The soil profile showed distinct layers of eluvia overlying the bedrock.
• Mining companies often prospect for ore in eluvia deposits near the surface.