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Headland-bay Beach
A logarithmic spiral beach is a type of beach which develops in the direction under which it is sheltered by a headland, in an area called the ''shadow zone''. It is shaped like a logarithmic spiral when seen in a map, plan view, or aerial photograph. These beaches are also commonly referred to as half heart beach, crenulate-shaped bay, or headland-bay beach. Logarithmic spiral relation The logarithmic spiral can be determined using the equation (written in polar coordinates): :r = e^{\theta \cot \alpha} where: \theta = the angle of rotation, is located between two lines drawn from the origin to any two points on the spiral. r = the ratio of the lengths between two lines that extend out from the origin. The two lines are given as R_O and R. So r also equals the ratio R/R_O. \alpha = the angle between any line R from the origin and the line tangent to the spiral which is at the point where line R intersects the spiral. \alpha is a constant for any given logarithmic spiral. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Ettalong Lookout (14309767219)
Mount is often used as part of the name of specific mountains, e.g. Mount Everest. Mount or Mounts may also refer to: Places * Mount, Cornwall, a village in Warleggan parish, England * Mount, Perranzabuloe, a hamlet in Perranzabuloe parish, Cornwall, England * Mounts, Indiana, a community in Gibson County, Indiana, United States People * Mount (surname) * William L. Mounts (1862–1929), American lawyer and politician Computing and software * Mount (computing), the process of making a file system accessible * Mount (Unix), the utility in Unix-like operating systems which mounts file systems Displays and equipment * Mount, a fixed point for attaching equipment, such as a hardpoint on an airframe * Mounting board, in picture framing * Mount, a hanging scroll for mounting paintings * Mount, to display an item on a heavy backing such as foamcore, e.g.: ** To pin a biological specimen, on a heavy backing in a stretched stable position for ease of dissection or display ** To ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice-transported sediments. Classification Sediment can be classified based on its grain size, grain shape, and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Geographer
''Australian Geographer'' (''The Australian Geographer'' until 1975) is a quarterly peer-reviewed academic journal published by the Geographical Society of New South Wales since August 1928. Covering all aspects of Australian geography, it is currently copublished with Taylor & Francis. References External links * Further reading * Taylor & Francis academic journals Geography journals Publications established in 1928 English-language journals {{geography-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provincetown Harbor, Massachusetts
Provincetown is a New England town located at the extreme tip of Cape Cod in Barnstable County, Massachusetts, in the United States. A small coastal resort town with a year-round population of 3,664 as of the 2020 United States Census, Provincetown has a summer population as high as 60,000. Often called "P-town" or "P'town", the locale is known for its beaches, harbor, artists, tourist industry, and as a popular vacation destination for the LGBT+ community. History At the time of European encounter, the area was long settled by the historic Nauset tribe, who had a settlement known as "Meeshawn". They spoke Massachusett language, Massachusett, a Southern New England Algonquian languages, Algonquian language dialect that they shared in common with their closely related neighbors, the Wampanoag people, Wampanoag. On 15 May 1602, having made landfall from the west and believing it to be an island, Bartholomew Gosnold initially named this area "Shoal Hope". Later that day, afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pearl Beach, New South Wales
Pearl Beach is a suburb of on the Central Coast of New South Wales, Australia. Pearl Beach was assigned 'suburb' status by the Geographical Names Board of NSW on 25 October 1991. History Pearl Beach has a rich Indigenous history that is largely ignored by historical markers which have been erected in the community to commemorate visits by white settlers. On 2 March 1788 Captain Arthur Phillip sailed north from Sydney Cove, Port Jackson, to the inlet described by Captain James Cook in 1770 as a "broken land" (id est Broken Bay). As entered in their journals: * "We slept in the boat that night within a rocky point in the north-west part of the bay (which is very extensive) as the native tho very friendly appeared to be numerous", Gov. Capt. A. Phillip R.N.. * "At 9 at night moored the boats in a cove on the N. side of the bay off which the surf broke violently... They were met by a great number of the natives men, women and children... They were all very friendly", Lieut. Wm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Moon Bay, California
Half Moon Bay is a coastal city in San Mateo County, California, United States, approximately south of San Francisco. Its population was 11,795 as of the 2020 census. Immediately at the north of Half Moon Bay is Pillar Point Harbor and the unincorporated community of Princeton-by-the-Sea. Half Moon Bay is known for Mavericks, a big-wave surf location. It is called Half Moon Bay because of its crescent shape. Originally an agricultural outpost to Mission San Francisco de Asís, the town was founded in the 1840s first as San Benito, and then as is its Anglo fishing community grew, it was renamed Spanishtown. In 1874, it was again renamed to Half Moon Bay. After rail and road connections in the early 1900s, the town grew. The foggy weather of the coast made the town a popular destination for booze-running during Prohibition. The city's infrastructure is heavily integrated with the coast, including the Pillar Point Harbor, major roads and fire department. The economy of Half M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Restinga Beach
Restingas () are a distinct type of coastal tropical and subtropical moist broadleaf forest in eastern Brazil. They form on sandy, acidic, and nutrient-poor soils, and are characterized by medium-sized trees and shrubs adapted to the drier and nutrient-poor conditions. One of the most notable restingas is the Restinga da Marambaia (in Rio de Janeiro), which is owned and kept by the Brazilian Army. Ecoregions The World Wildlife Fund distinguishes two ''Restinga'' ecoregions. * Atlantic Coast restingas — found in several enclaves along Brazil's east coast from Rio Grande do Norte state in northeastern Brazil to Rio Grande do Sul state in southern Brazil, covering an area of that extends from the tropics to the subtropics. Its flora and fauna shares affinities with the humid Atlantic forest of eastern Brazil. * Northeastern Brazil restingas — found along the northern coast of Brazil, in Maranhão Maranhão () is a state in Brazil. Located in the country's Northeast Reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birch Bay, Washington
Birch Bay is a protected bay of the east shore of the Salish Sea, between Semiahmoo Bay and Lummi Bay; approximately north of Seattle and south of Vancouver, BC, Canada. The bay gives its name to a census-designated place (CDP) along the bay's shore in Whatcom County, Washington, United States. The population was 8,413 at the 2010 census, a 69.6% increase over the 2000 census. Birch Bay was named in 1792 by Archibald Menzies, a member of the Vancouver Expedition. Vancouver's two ships used Birch Bay as an anchorage for several days. Menzies noted a number of species of birch and gave the name to the bay. Geography Birch Bay is located at (48.932167, -122.747192). According to the United States Census Bureau, the CDP has a total area of 21.2 square miles (55.0 km2), of which, 15.8 square miles (40.9 km2) of it is land and 5.4 square miles (14.0 km2) of it (25.45%) is water. Geology Birch Bay is a headland bay created by the refraction of in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swash
Swash, or forewash in geography, is a turbulent layer of water that washes up on the beach after an incoming wave has broken. The swash action can move beach materials up and down the beach, which results in the cross-shore sediment exchange. The time-scale of swash motion varies from seconds to minutes depending on the type of beach (see Figure 1 for beach types). Greater swash generally occurs on flatter beaches. The swash motion plays the primary role in the formation of morphological features and their changes in the swash zone. The swash action also plays an important role as one of the instantaneous processes in wider coastal morphodynamics. There are two approaches that describe swash motions: (1) swash resulting from the collapse of high-frequency bores (''f''>0.05 Hz) on the beachface; and (2) swash characterised by standing, low-frequency (''f''20 indicate dissipative conditions where swash is characterised by standing long-wave motion. Values εb<2.5 indicate r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berm
A berm is a level space, shelf, or raised barrier (usually made of compacted soil) separating areas in a vertical way, especially partway up a long slope. It can serve as a terrace road, track, path, a fortification line, a border/ separation barrier for navigation, good drainage, industry, or other purposes. Etymology The word is one of Middle Dutch and came into usage in English via French. Military use History In medieval military engineering, a berm (or berme) was a level space between a parapet or defensive wall and an adjacent steep-walled ditch or moat. It was intended to reduce soil pressure on the walls of the excavated part to prevent its collapse. It also meant that debris dislodged from fortifications would not fall into (and fill) a ditch or moat. In the trench warfare of World War I, the name was applied to a similar feature at the lip of a trench, which served mainly as an elbow-rest for riflemen. Modern usage In modern military engineering, a berm is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swell (ocean)
A swell, also sometimes referred to as ground swell, in the context of an ocean, sea or lake, is a series of mechanical waves that propagate along the interface between water and air under the predominating influence of gravity, and thus are often referred to as surface gravity waves. These surface gravity waves have their origin as wind waves, but are the consequence of dispersion of wind waves from distant weather systems, where wind blows for a duration of time over a fetch of water, and these waves move out from the source area at speeds that are a function of wave period and length. More generally, a swell consists of wind-generated waves that are not greatly affected by the local wind at that time. Swell waves often have a relatively long wavelength, as short wavelength waves carry less energy and dissipate faster, but this varies due to the size, strength, and duration of the weather system responsible for the swell and the size of the water body, and varies from event to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beach
A beach is a landform alongside a body of water which consists of loose particles. The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, etc., or biological sources, such as mollusc shells or coralline algae. Sediments settle in different densities and structures, depending on the local wave action and weather, creating different textures, colors and gradients or layers of material. Though some beaches form on inland freshwater locations such as lakes and rivers, most beaches are in coastal areas where wave or current action deposits and reworks sediments. Erosion and changing of beach geologies happens through natural processes, like wave action and extreme weather events. Where wind conditions are correct, beaches can be backed by coastal dunes which offer protection and regeneration for the beach. However, these natural forces have become more extreme due to climate change, permanently altering beaches at very rapid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
