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Boulder Climbing Routes
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. Etymology The word ''boulder'' derives from ''boulder stone'', from Middle English ''bulderston'' or Swedish ''bullersten''. Online Etymology Dictionary. Retrieved December 9, 2011, from Dictionary.com website. About In places covered by s during |
Balanced Rock
Balanced Rock is one of the most popular features of Arches National Park, situated in Grand County, Utah, 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. Geology Balanced Rock is composed of the hard Slick Rock Member of the Entrada Sandstone formation. It sits on a pedestal of the softer Dewey Bridge Member, which erodes at a faster rate. As a result, it will eventually collapse. Balanced Rock had a smaller sibling named "Chip Off the Old Block" that collapsed in the winter of 1975–76 as a result of the same forces. Access The formation can be accessed by a 1/4 mile (400 meter) paved loop trail from the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bedrock
In geology, bedrock is solid rock that lies under loose material ( regolith) within the crust of Earth or another terrestrial planet. Definition Bedrock is the solid rock that underlies looser surface material. An exposed portion of bedrock is often called an outcrop. The various kinds of broken and weathered rock material, such as soil and subsoil, that may overlie the bedrock are known as regolith. Engineering geology The surface of the bedrock beneath the soil cover (regolith) is also known as ''rockhead'' in engineering geology, and its identification by digging, drilling or geophysical methods is an important task in most civil engineering projects. Superficial deposits can be very thick, such that the bedrock lies hundreds of meters below the surface. Weathering of bedrock Exposed bedrock experiences weathering, which may be physical or chemical, and which alters the structure of the rock to leave it susceptible to erosion. Bedrock may also experience subsur ... [...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, 30 minutes North, and 64 degrees, 30 minutes West, it covers an area of about . The main commercial and residential area is Spanish Town, British Virgin Islands, 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 l ... [...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 Spanish Town, British Virgin Islands, 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 (batholiths) 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 erosion, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valley
A valley is an elongated low area often running between hills or mountains and typically containing 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 glacial ice. These glaciers may remain present in valleys in high mountains or polar areas. At lower latitudes and altitudes, these 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 areas of limestone bedrock, dry valleys may also result from drainage now taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms that may be global in use or else applied only locally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of island countries, sixth-largest island country by area and lies east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The Geography of New Zealand, country's varied topography and sharp mountain peaks, including the Southern Alps (), owe much to tectonic uplift and volcanic eruptions. Capital of New Zealand, 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 subsequently developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. ... [...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 Kaikohe is the seat of the Far North District of New Zealand, situated on State Highway 12 about from Auckland, and about from Whangārei. It is the largest inland town and highest community above sea level in the Northland Region. With a pop ...) 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal 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 Northern Territory looks out to the Timor Sea, the Arafura Sea, and the Gulf of Carpentaria, including Western New Guinea and various 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 the population of Tasmania. The largest population centre is the capital city of Darw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller islands. It has a total area of , making it the list of countries and dependencies by area, sixth-largest country in the world and the largest in Oceania. Australia is the world's flattest and driest inhabited continent. It is a megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and Climate of Australia, climates including deserts of Australia, deserts in the Outback, interior and forests of Australia, tropical rainforests along the Eastern states of Australia, coast. The ancestors of Aboriginal Australians began arriving from south-east Asia 50,000 to 65,000 years ago, during the Last Glacial Period, last glacial period. By the time of British settlement, Aboriginal Australians spoke 250 distinct l ... [...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 hamlet of Wycliffe Well is 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, transports it to another location where it is deposit (geology), 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 Solvation, 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 Wind wave, waves; glacier, glacial Plucking (glaciation), plucking, Abrasion (geology), abrasion, and scour; areal flooding; Aeolian processes, wind abrasion; groundwater processes; and Mass wastin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rock Formation
A rock formation is an isolated, scenic, or spectacular surface rock (geology), rock outcrop. Rock formations are usually the result of weathering and erosion sculpting the existing rock. The term ''rock Geological formation, formation'' can also refer to specific sedimentary stratum, strata or other rock unit in stratigraphy, stratigraphic and petrology, petrologic studies. A rock structure can be created in any rock type or combination: * Igneous rocks are created when molten rock cools and solidifies, with or without crystallisation. They may be either plutonic bodies or volcanic extrusive. Again, erosive forces sculpt their current forms. * Metamorphic rocks are created by rocks that have been transformed into another kind of rock, usually by some combination of heat, pressure, and chemical alteration. * Sedimentary rocks are created by a variety of processes but usually involving deposition, grain by grain, layer by layer, in water or, in the case of terrestrial se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
