What are shoaling areas typically composed of?

Shoaling areas are typically composed of sand, pebbles, or silt. These sediment materials are the result of natural processes such as erosion and sedimentation, often found in shallow water where the bottom configuration changes with currents and waves. The accumulation of these materials in these areas can create hazards for boating, as they may become less navigable or lead to grounding. Understanding the composition and characteristics of shoaling areas is crucial for safe navigation in waterways, particularly in regions where water depths are variable.