BEACH CUSPS Meaning and
Definition
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Beach cusps are distinct, crescent-shaped formations that occur on certain shorelines, characterized by regularly spaced ridges and indentations along the sandy beach. These cusps typically have a symmetrical pattern and repetitive shape.
The formation of beach cusps is primarily influenced by wave dynamics and sediment transport processes. They occur when specific wave conditions interact with the geometry of the coastline. The regular rise and fall of wave swash onto the beach causes the redistribution of sediment along the shore. As waves approach the beach obliquely, the sediment is transported in a zigzag pattern, leading to the accumulation of sediment in the cusp horns (or ridges) and the erosion of sediment in the cusp embayments (or troughs).
The spacing and formation of beach cusps are determined by various factors such as wave angle, wave height, sediment size, and beach slope. Typically, cusps are found on beaches with steep slopes and medium to coarse sediment. Furthermore, these formations tend to be self-sustaining, meaning that once established, they persist for some time.
The function and significance of beach cusps are still debated among scientists. Some theories suggest that they may serve as an effective means of dissipating wave energy, thus preventing erosion of the coastline. Others propose that they aid in sediment sorting and promote beach stability. Additionally, beach cusps can influence nearshore circulation patterns and habitat availability for certain marine organisms.
Etymology of BEACH CUSPS
The etymology of the term "beach cusps" is derived from the Middle English word "cuspe" or "cuspis", which means a pointed or projecting part. The word "beach" originates from Old English "bæce", which means "shore" or "bank". When these two words are combined, "beach cusps" refers to the pointed formations or crescent-shaped patterns found on the shoreline of certain beaches.
