Why are sand and shingle beaches different?

Sand and shingle beaches differ primarily in their composition and texture. Sand beaches are made up of fine, granular particles that allow for smoother surfaces and often create gentle slopes. In contrast, shingle beaches consist of larger, rounded stones or pebbles, resulting in a coarser texture and steeper profiles. These differences affect wave energy absorption, erosion patterns, and the types of ecosystems that can thrive in each environment.