how was the sand of the beaches of hawali
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Answers
Most beaches in the world are made up of the quartz mineral; others contain small rocks, coral or shell fragments, iron, small gemstones and other minerals.
The Hawaiian islands are of volcanic origin, formed by undersea volcanoes. Since Hawaii does not have a continental source of quartz, the popular white beaches here are composed of the carbonate shells of marine organisms.The Hawaiian islands are surrounded by an extensive coral reef, which continuously grows as well as breaks down.
The coral reef is built by marine animals, such as corals, and plants, such as algae, that live on the reefs.Corals are the main contributor to a reef's growth. A coral is a tiny animal referred to as a polyp. It has a hard shell that is composed of calcium carbonate, which it extracts from the substances of the ocean. A collection of matured hard coral is called a coral colony. Coralline plants, or calcareous algae, also contribute to a coral reef's growth. This algae grows on the coral heads and also uses calcium carbonate in the reef building process. Many other species, such as sponges and other algae, live on the coral reef that are part of this ecosystem.
