1. relating to or composed of colluvium; formed by the accumulation of rock debris and soil at the base of slopes or in valleys through gravity and water movement
Usage: geology; technical

Examples

• The colluvial deposits at the foot of the mountain contained fragments of the bedrock above.
• Geologists studied the colluvial soils to understand the erosion patterns in the region.
• The colluvial material accumulated over thousands of years as the hillside weathered.
• Colluvial fans are common features in arid and semi-arid landscapes.
• The colluvial layer provided evidence of past landslide activity.