| Webster's Online Dictionary |
| Expressions | Definition | ||
| Black sand | Black sand is a heavy, weakly magnetic, glossy, semi-metallic mixture of usually fine sands, found as part of a placer deposit. (references) | ||
| Punalu'u Black Sand Beach | Punalu'u Black Sand Beach is a beach near Naalehu, Hawaii on the Big Island of Hawaii that has black sand created by volcanic activity. The volcanic activity is now in Hawaii Volcanoes National Park. Taking black sand is prohibited, but local tradition says that if any of the black sand from Punalu'u beach is taken away from Hawaii that the person that took it will be cursed until it is returned. The same is said about the local volcanic rocks. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Black sand | Mining | A. An alluvial or beach sand consisting predominantly of grains of heavy, dark minerals or rocks (e.g., magnetite, rutile, garnet, or basaltic glass), concentrated chiefly by wave, current, or surf action. It may yield valuable minerals. See also: beach placer b. An asphaltic sand. (references) | |
| Black sand beach | Geological | The famous "black sand" beaches of Hawaii were created virtually instantaneously by the violent interaction between hot lava and sea water. (Tilling, 1985). (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
