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Blowhole (geology)
''For the cave phenomena sometimes referred to as a blowhole, see Breathing cave''In geology, a blowhole or marine geyser is formed as sea caves grow landward and upward into vertical shafts and expose themselves toward the surface, which can result in hydraulic compression of seawater that is released through a port from the top of the blowhole. The geometry of the cave and blowhole along with tide levels and swell conditions determine the height of the spray. Mechanics Blowholes are likely to occur in areas where there are crevices, such as lava tubes, in rock along the coast. These areas are often located along fault lines and on islands. As powerful waves hit the coast, water rushes into these crevices and bursts out in a high pressured release. It is often accompanied by a loud noise and wide spray, and for this reason, blowholes are often sites of tourism. Marine erosion on rocky coastlines produce blowholes that are found throughout the world. They are found at in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breathing Cave
A breathing cave or barometric cave is a rare type of cave in which atmospheric pressure gradients between the inside and outside of a cave cause air to flow in to or out of the cave. The concept of air flowing through a cave is common, but in most caves this airflow is caused by a difference in temperature rather than air pressure; in barometric caves the thermal mechanism inside the cave is not great enough to cause such airflow. The speed of the airflow in barometric caves is directly correlated with the atmospheric pressure difference between the inside and outside of the cave. When the air pressure outside of the cave is higher than that inside the cave air blows into the cave and vice versa; if the air pressures are at equilibrium there is no airflow. In some breathing caves, the airflow can only be meaningfully measured near the entrance. This tends to be the case in caves which primarily feature large, wide passageways, notably Wind Cave National Park, Wind Cave in South D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parent Material
Parent material is the underlying geological material (generally bedrock or a superficial deposits, superficial or drift (geology), drift deposit) in which soil horizons form. Soils typically inherit a great deal of structure and minerals from their parent material, and, as such, are often classified based upon their contents of consolidated or unconsolidated mineral material that has undergone some degree of physical or chemical weathering and the mode by which the materials were most recently transported. Consolidated Parent materials that are predominantly composed of consolidated rock are termed residual parent material. The consolidated rocks consist of igneous, sedimentary, and metamorphic rock, etc. Residual Soil developed in residual parent material is that which forms in consolidated geologic material. Unconsolidated This parent material is loosely arranged, particles are not cemented together, and not stratified. This parent material is classified by its last means of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South Australia to the west. Its coast borders the Coral Sea, Coral and Tasman Seas to the east. The Australian Capital Territory and Jervis Bay Territory are Enclave and exclave, enclaves within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. , the population of New South Wales was over 8.3 million, making it Australia's most populous state. Almost two-thirds of the state's population, 5.3 million, live in the Greater Sydney area. The Colony of New South Wales was founded as a British penal colony in 1788. It originally comprised more than half of the Australian mainland with its Western Australia border, western boundary set at 129th meridian east in 1825. The colony then also includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiama Blowhole
The Kiama Blowhole is a blowhole in the town of Kiama, New South Wales, Australia. The name 'Kiama' has long been translated as "where the sea makes a noise". It is one of the town's major tourist attractions. Under certain sea conditions, the blowhole can spray 50 litres of water up to 25 metres (82 ft) in the air, in quantities that thoroughly drench any bystanders. There is a second, less famous blowhole in Kiama, commonly referred to as the "Little Blowhole" by locals. It is much smaller than the other (called the "Big Blowhole"), but due to its narrow shape, it is more reliable than the Big Blowhole, and in the right conditions can be equally spectacular. The blowhole attracts 900,000 tourists a year. Kiama Blowhole is just a few metres beyond the coastline. The "little blowhole" is located at the Little Blowhole Reserve, Tingira Crescent, Kiama, 2 km south of the main blowhole. History The blowhole was formed from basalt lava flows approximately 260 million year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oahu
Oahu (, , sometimes written Oahu) is the third-largest and most populated island of the Hawaiian Islands and of the U.S. state of Hawaii. The state capital, Honolulu, is on Oahu's southeast coast. The island of Oahu and the uninhabited Northwestern Hawaiian Islands constitute the City and County of Honolulu, Hawaii, City and County of Honolulu. In 2021, Oahu had a population of 995,638, up from 953,207 in 2010 (approximately 70% of the total 1,455,271 population of the Hawaiian Islands, with approximately 81% of those living in or near the Honolulu urban area). Oahu is long and across. Its shoreline is long. Including small associated islands such as Ford Island plus those in Kāneohe Bay and off the eastern (windward and leeward, windward) coast, its area is , making it the List of islands of the United States by area, 20th-largest island in the United States. Well-known features of Oahu include Waikīkī, Pearl Harbor, Diamond Head, Hawaii, Diamond Head, Hanauma Bay, Kān ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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". Description 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. The blowhole is most active when the tide is high and the winds are strong, and it can shoot sea spray up to thirty feet high in the air. Hālona Point is a tourist spot, with visitors coming for the scenery, the beach at the cove, and in the winter as a spot to go to see humpback whales or Honu turtles (Hawaiian Green Sea Turtles). The blowhole is perhaps the most popular rock formation of its kind found in Hawaii. Formation The Hālona Blowhole was formed thousands of years ago during the period of volcanic activity in Oahu, with Koko Crater's lava flowing into the ocean.The Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sri Lanka
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, Indian peninsula by the Gulf of Mannar and the Palk Strait. It shares a maritime border with the Maldives in the southwest and India in the northwest. Sri Jayawardenepura Kotte is the legislative capital of Sri Lanka, while the largest city, Colombo, is the administrative and judicial capital which is the nation's political, financial and cultural centre. Kandy is the second-largest urban area and also the capital of the last native kingdom of Sri Lanka. The most spoken language Sinhala language, Sinhala, is spoken by the majority of the population (approximately 17 million). Tamil language, Tamil is also spoken by approximately five million people, making it the second most-spoken language in Sri Lanka. Sri Lanka has a population of appr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hummanaya
Hummanaya Blowhole is the only known blowhole in Sri Lanka and it is considered to be the second largest blowhole in the world. ( Sinhala: = ) refers to the noise, "hoo", that can be heard a distance away when the blowhole is active. Location The Hummanaya Blowhole is located from the small fishing village of Kudawella, which is from Matara, from Dikwella and from Tangalle, in the Southern Province. Attraction Hummanaya is a natural blowhole and is caused when sea water rushes through a submerged cavern and is pushed upwards. The sea water flows underneath the shore and then comes out of this hole due to pressure. The water fountain created by the geological feature shoots up every couple of minutes, depending on the nature of the sea, with the spray often reaching as high as to . This site has now been developed as a tourist attraction, with a small visitors' information centre on marine life Marine life, sea life or ocean life is the collective ecological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barbados
Barbados, officially the Republic of Barbados, is an island country in the Atlantic Ocean. It is part of the Lesser Antilles of the West Indies and the easternmost island of the Caribbean region. It lies on the boundary of the South American Plate, South American and Caribbean Plate, Caribbean plates. Its capital and largest city is Bridgetown. Inhabited by Island Caribs, Kalinago people since the 13th century, and prior to that by other Indigenous peoples of the Americas, Indigenous peoples, Barbados was claimed for the Crown of Castile by Spanish navigators in the late 15th century. It first appeared on a Spanish map in 1511. The Portuguese Empire claimed the island between 1532 and 1536, but abandoned it in 1620 with their only remnants being the introduction of wild boars intended as a supply of meat whenever the island was visited. An Kingdom of England, English ship, the ''Olive Blossom'', arrived in Barbados on 14 May 1625; its men took possession of the island in the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samoa
Samoa, officially the Independent State of Samoa and known until 1997 as Western Samoa, is an island country in Polynesia, part of Oceania, in the South Pacific Ocean. It consists of two main islands (Savai'i and Upolu), two smaller, inhabited islands (Manono Island, Manono and Apolima), and several smaller, uninhabited islands, including the Aleipata Islands (Nuʻutele, Nuʻulua, Fanuatapu and Namua). Samoa is located west of American Samoa, northeast of Tonga, northeast of Fiji, east of Wallis and Futuna, southeast of Tuvalu, south of Tokelau, southwest of Hawaii, and northwest of Niue. The capital and largest city is Apia. The Lapita culture, Lapita people discovered and settled the Samoan Islands around 3,500 years ago. They developed a Samoan language and Culture of Samoa, Samoan cultural identity. Samoa is a Unitary state, unitary Parliamentary system, parliamentary democracy with 11 Districts of Samoa, administrative divisions. It is a sovereign state and a membe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alofaaga Blowholes
The Alofaaga Blowholes, also known as the Taga Blowholes, are a natural feature located in the district of Palauli, south west of Salelologa wharf on the island of Savai'i in Samoa. The entrance to the blowholes is in the village of Taga. In this area, lava flows have created a series of tubes connecting a flat clifftop of lava rock with the ocean below. Waves breaking against the lower end of the lava tubes send water at high pressure up through the tubes, creating fountains that spray every few seconds. As most of the land in Samoa is under customary ownership, the village charges a small admission for entry to view the blowholes. The area is unfenced and surrounded by wet, slippery rocks which can be dangerous. Falling into one of the blowholes would be almost certainly fatal. A track along the coast can be followed west to the ancient village of Fagaloa. Gallery File:Blowholes Savai'i 2009.jpg File:Samoa Blowholes.JPG See also * Piula Cave Pool * Mata o le Alelo P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
