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The beaches with black sand are volcanic in origin.
Black sand is sand that's been turned a black color either by a glossy partly-magnetic mix of sands (usually fine), or by tiny fragments of lava.Some gold and white beaches can also contain black sand, typically after storms have sorted out grains where heavier, darker particles remain on the surface.There are many black sand beaches around the world. Prince William Sound, in Alaska, and Lost Coast, California, both have black sand beaches named Black Sand Beach. Hawaii has Kehena Beach, Oneuli Beach, Polulu Valley Beach and Kaimu Beach. Maui hosts Oneuli Beach, Honokalani Black Sand Beach and Waianapanapa Black Sand Beach. Finally, Vik Beach in Iceland has some breathtakingly blue water surrounded by eroded rock formations beyond a beach of black sand.For more black sand beaches, try a Web or Image search on Google or your favorite search engine for black sand beach. You'll be stunned by some of the amazing photos.
for its beaches
Volcanic beaches are black because the sediments on the beach come from volcanoes. In other words, if a beach is black, that means that there was or is volcanic activity in the area.
It depends on the soil. There is red clay soil, brown sandy soil, and dark brown/black earthy soil. There are white sand beaches, black sand beaches and there are even a few beaches with green sand.
Polish beaches are sandy, yes, but they are not on the Black Sea. It's Baltic Sea.
The Hawaiian islands are actually undersea volcanoes. Most of the volcanoes are no longer active, but some continue to erupt. The sparkling black sand covering some Hawaiian beaches formed when hot lava from the volcanoes flowed into the ocean.
most people say that the most beautiful island of Hawaii is kauaii and i agree. kauaii is the most relaxing one and it is the one that has no valcanos that are expectied to eruped in a long time or even yet probly never.
Iron-sand
Because they are made of black volcanic sand rather than white coral sand or white quartz/limestone sand. However, Japan has also many white sand beaches, which are made of white coral sand (southern islands) and white quartz/limestone sand (peninsulas on mainlands). White sand beaches in Japan: http://www.flickr.com/photos/ippei-janine/sets/72157600321338295/ There are also black sand beaches in volcanic countries such as Hawaii and Iceland.
they have ease kinds of black
Black Bears are covered in black fur, and brown bears are covered in brown fur.