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Hālona Blowhole
Hālona Blowhole is a rock formation and a blowhole on the island of Oahu, Hawaii off of Hanauma Bay at Hālona Point overlooking the Pacific Ocean. In Hawaiian ''hālona'' means "lookout".
On windy days when the tide is high, the ocean breeze sends the waves rolling on to the shore where the rock formation then shoots sea spray high into the air through the cave acting like a geyser. It is not always at its best every day though. The blowhole is most active when the tide is high and the winds are strong.〔"Secrets of Hawaii - Halona Blowhole." Secrets of Hawaii. N.p., n.d. Web. 16 Sep 2010. .〕 This is a big tourist spot in Hawaii. People come from all over to enjoy the beautiful scenery, the beach at the cove, and in the winter it is the spot to go to see the humpback whale as they take their journey leaving the North Pacific〔French, Howard W. "Oahu, Beyond Pearl Harbor and Waikiki." The New York Times. N.p., 28 mar 1999. Web. 15 Sep 2010. .〕 or the Honu (The Hawaiian Green Sea Turtles) swimming about.〔"The Halona Blowhole on Oahu." N.p., 11 Jun 2007. Web. 16 Sep 2010. .〕 Diving is possible along the coast when there are light northerly winds blowing and no surf. It is recommended diving elsewhere when waves are breaking. The erratic tidal changes that take place offshore make the waters experience a strong current called Moloka'i Express that can drag divers out to sea. A large wedged shape area right off the coast next to the cove is a reef coated with Sinularia Leather Coral, which is a coral that does not need much light to live, in which you can find many different species like echinoderms, slugs, corals, and eels. The shoreline cliff beyond the cove, ending at a point, should be the limit of any shore diving here due to the strong current and distance. There is also a narrow rift along the base of the cliff which was formed by a large section of rock that broke away from the land can be seen very well on a clear day.〔http://www.marinelifephotography.com/diving/oahu/blowhole.htm〕
== How Hālona was Formed ==
Thousands of years ago when volcanoes were still active on Oahu, Koko Crater's lava flowed into the ocean there at Hālona Point.〔The halona blowhole. (n.d.). Retrieved from http://www.discover-oahu.com/halona-blowhole.html〕 The molten lava tubes from volcanic eruptions that occurred thousands of years ago formed the natural occurrence known as the Hālona Blowhole.〔"Halonas Blowhole - Nature's Whale." Hawaii Life of Luxury. N.p., 03 sep 2008. Web. 15 Sep 2010. .〕 The lava tubes extend into the ocean which are very narrow at the top,〔The halona blowhole. (n.d.). Retrieved from http://www.discover-oahu.com/halona-blowhole.html〕 and when the surf is just right, the mighty blowhole can shoot sea spray up to thirty feet high in the air 〔Nicholson, Sarah. "Try Taking the Road Less Travelled." Sunday Herald Sun 2009. n. pag. Web. Galileo. Retrieved at Georgia Southern University Henderson Library. .〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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