where does the sand come from on waikiki beach
Waikiki Over time, Waikīkī beach has had problems with erosion, leading to the construction of groynes and beach replenishment projects. For example, in the 1920s and 1930s sand was imported from Manhattan Beach, California, via ship and barge to Waikīkī.[12] Importing stopped in the 1970s. Officials are looking for ways to sustain the existing sand by eliminating loss due to tidal flow.[13] Subject to permits, a partial restoration was completed in the spring of 2012. The proposed project imported sand from nearby shoals and widened the 1,700-foot (520 m) long beach by about 37 feet (11 m) between the Royal Hawaiian Hotel concrete groyne and the Kūhiō Beach crib wall. The project restored the beach to its 1985 shoreline.[14]
White Sands, New Mexico The desert is located in the Tularosa Basin of New Mexico. Its white sands are not composed of quartz, like most desert sands, but of gypsum and calcium sulfate. Unlike other desert sands, it is cool to the touch, due to the high rate of evaporation of surface moisture and the fact that the sands reflect, rather than absorb, the sun's rays. At 1185 meters above sea level, there are approximately 442 square kilometers of dune fields and is known to be the world's largest surface deposit of gypsum.[5]