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Boulder Canyon Project Act
In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks or stones. The word ''boulder'' derives from ''boulder stone'', from the Middle English ''bulderston'' or Swedish ''bullersten''. Online Etymology Dictionary. Retrieved December 9, 2011, from Dictionary.com website. In places covered by s during s, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balanced Rock
Balanced Rock is one of the most popular features of Arches National Park, situated in Grand County, Utah, United States. Balanced Rock is located next to the park's main road, at about 9.2 miles (14.8 km) from the park entrance. It is one of only a few prominent features clearly visible from the road. The total height of Balanced Rock is 128 feet (39 m), with the balancing rock rising 55 feet (16.75 m) above the base. This rock is the largest of its kind in the park, weighing approximately 3,577 tons, the same as an icebreaker ship or 27 blue whales. Balanced Rock had a smaller sibling named "Chip-Off-the-Old-Block" that collapsed in the winter of 1975–76, the eventual fate of this feature as well. There is also a short loop trail leading around the base of the rock. See also *Balanced Rock (Garden of the Gods) *Balancing rock References External links Arches National Park Balanced Rock pageBalanced Rock of the Hudson Valley – Large perched rock and possibleDru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedestal
A pedestal (from French ''piédestal'', Italian ''piedistallo'' 'foot of a stall') or plinth is a support at the bottom of a statue, vase, column, or certain altars. Smaller pedestals, especially if round in shape, may be called socles. In civil engineering, it is also called ''basement''. The minimum height of the plinth is usually kept as 45 cm (for buildings). It transmits loads from superstructure to the substructure and acts as the retaining wall for the filling inside the plinth or raised floor. In sculpting, the terms base, plinth, and pedestal are defined according to their subtle differences. A base is defined as a large mass that supports the sculpture from below. A plinth is defined as a flat and planar support which separates the sculpture from the environment. A pedestal, on the other hand, is defined as a shaft-like form that raises the sculpture and separates it from the base. An elevated pedestal or plinth that bears a statue, and which is raised from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Virgin Islands
) , anthem = "God Save the King" , song_type = Territorial song , song = "Oh, Beautiful Virgin Islands" , image_map = File:British Virgin Islands on the globe (Americas centered).svg , map_caption = , mapsize = 290px , image_map2 = British Virgin Islands - Location Map (2013) - VGB - UNOCHA.svg , mapsize2 = 250px , subdivision_type = Sovereign state , subdivision_name = , established_title = , established_date = Dutch West Indies , established_title2 = British capture , established_date2 = 1672 , established_title3 = Cooper Island (British Virgin Islands), Cooper Island sold to UK , established_date3 = 1905 , established_title4 = Separate colony , established_date4 = 1960 , established_title5 = Autonomy , established_date5 = 1967 , official_languages = North American English, English , demonym = , capital = Road Town , coordinates = , largest_city = capital , ethnic_groups = 76.9% Black people, Black5.6% Hispanic5.4% White people, White5.4% Multirac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virgin Gorda
Virgin Gorda () is the third-largest island (after Tortola and Anegada) and second-most populous of the British Virgin Islands (BVI). Geography Located at about 18 degrees, 48 minutes North, and 64 degrees, 30 minutes West, it covers an area of about . The main commercial and residential area is Spanish Town on the southwestern part of the island. An unusual geologic formation known as "the Baths" located on the southern end of the island makes Virgin Gorda one of the BVI's major tourist destinations. At the Baths, in spite of evidence of the island's largely volcanic origins, huge granite boulders lie in piles on the beach, forming scenic grottoes that are open to the sea. Granite is an intrusive igneous rock, thus not volcanic. It did form from magma, however, at great depth. Granite becomes exposed at the Earth's surface only after geologic ages of erosion removes the overburden. At the surface, weathering has broken the granite into large boulders and rounded their su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Baths
The Baths is a beach area on the island of Virgin Gorda among the British Virgin Islands in the Caribbean. Geography The Baths is situated about south off the maintown Spanish Town at the southern tip of the island between Spring Bay and Devil's Bay. The Baths is an area of unique geologic formations and one of the BVI's major tourist destinations. Area Although volcanism accounts for much of the Virgin Islands, The Baths was formed by granite that eroded into piles of boulders on the beach. Granite forms from the slow cooling of magma at depth nowhere close to surface volcanoes. The granite only appears at the surface after geologic ages have eroded away all the overburden covering it. Once exposed, erosion continued to isolate the granite into large boulders and round their surfaces. The boulders form natural tidal pools, tunnels, arches, and scenic grottoes that are open to the sea. The largest boulders are about long. Since 1990, the area has been a BVI National Park a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valley
A valley is an elongated low area often running between Hill, hills or Mountain, mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacier, glacial ice. These glaciers may remain present in valleys in high mountains or polar areas. At lower latitudes and altitudes, these glaciation, glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In karst, areas of limestone bedrock, dry valleys may also result from drainage now taking place cave, underground rather than at the surface. Rift valleys arise principally from tectonics, earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island country by area, covering . New Zealand is about east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and then developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. In 1840, representatives of the United Kingdom and Māori chiefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horeke Basalts
The Horeke basalts is a disused formation that contained Miocene-Pliocene basalt lava flows that covered a large area in central Northland Region of New Zealand, and in places forms a high plateau around Okaihau. Wairere Boulders is a nature park providing walkways through boulders of basalt, derived by erosion of one of these older basalt flows that used to be included in the Horeke Basalt and are now included in the Kerikeri Volcanic Group. Origin The boulders in the Wairere valley are the erosional remnants of a lava flow out of a volcano near Lake Ōmāpere (near Kaikohe) that has been dated as approximately 2.8 million years old. There are two dates for these Horeke basalts: one at 2.84 and the other at 2.67 million years. There is a slight difference in chemistry in the two rocks that have been dated suggesting that the eruption took the form of several flows that once blanketed the high ground to the east of Horeke. Formation Erosion of the clay underlay ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half as many people as in Tasmania. The largest population center is the capital city of Darwin, Northern Territory, Darwin. The archaeological hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karlu Karlu / Devils Marbles Conservation Reserve
Karlu Karlu / Devils Marbles Conservation Reserve is a protected area in the Northern Territory of Australia located in the locality of Warumungu about south of Tennant Creek, and north of Alice Springs. The nearest settlement is the small town of Wauchope located to the south. The Devils Marbles are of great cultural and spiritual significance to the Aboriginal traditional owners of the land, and the reserve protects one of the oldest religious sites in the world as well as the natural rock formations found there. ''Karlu Karlu'' is the local Aboriginal term for both the rock features and the surrounding area. The Aboriginal term translates as "round boulders" and refers to the large boulders found mainly in the western side of the reserve. The English name for the boulders derives from a quote by John Ross during the 1870 Australian Overland Telegraph Line expedition, where he said "This is the Devil’s country; he’s even emptied his bag of marbles around the place!" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and waves; glacial plucking, abrasion, and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is eroded. Typically, physical erosion procee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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