Gravel or conglomerate soil is a type of ground material characterized by its composition of variously sized rock fragments. Unlike finer soils like clay or silt, gravel soil consists of small to large pebbles and stones, often mixed with some sand. This soil is known for its excellent drainage properties, as the large spaces between the rocks allow water to pass through easily. It's commonly found in natural settings like riverbeds and can also be used in landscaping for paths, driveways, and as a base layer for construction due to its stability and drainage capabilities. However, its coarse nature means it's less suitable for growing most plants, as it lacks the nutrients and moisture retention properties of finer soils.