: Sediments can range from fine powder to coarse gravel, shingle, or even boulders, with their arrangement shaped by wave action and wind. CHARACTERISTICS OF NATURAL BEACHES
: Many beaches are formed from the weathering of rock cliffs, resulting in diverse colors like the black lava sands of Hawaii or the green olivine beaches found in specific volcanic regions. Beaches
A beach is a dynamic, complex landform where land, sea, and air intersect. Far from being just simple expanses of sand, they are living ecosystems that undergo constant seasonal and geological change. Physical Composition and Color : Sediments can range from fine powder to