|
Rodeo Beach
Rodeo Beach ( ) is a beach in the Golden Gate National Recreation Area located in Marin County, California, United States, two miles north of the Golden Gate Bridge. It is characterized by a spit of around 50 meters width at the mouth of a long embayment, known as Rodeo Lagoon; for much of the year the lagoon is cut off from the ocean, making the beach spit a baymouth bar. Part of the beach is sheltered by cliffs. 'California Coastal Access Guide'', California Coastal Commission, University of California Press (2003)/ref> Rodeo Beach is known for its dark, pebbly sand, its uses for surfing and sunbathing, and its locale as a place for viewing, but not collecting, semi-precious stones. This beach is unique among California beaches in that it is largely made up of coarse, pebbly chert grains, both red and green in color. Its mineral composition sets it apart from every other beach in the state Surfing is possible throughout the year and at all tidal stages, but is best in summe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Cronkhite
Fort Cronkhite is one of the components of California's Golden Gate National Recreation Area. Today part of the National Park Service, Fort Cronkhite is a former US Army post that served as part of the coastal artillery defenses of the San Francisco Bay Area during World War II. The soldiers at Cronkhite manned gun batteries, radar sites, and other fortifications on the high ridges overlooking the fort. History Named for former U.S. Army Major General Adelbert Cronkhite, Fort Cronkhite was established in the late 1930s. With the rapid military buildup of the United States in the early 1940s, tens of thousands of temporary wooden structures had to be built by the army to house its growing ranks. The army's Quartermaster Corps and the Corps of Engineers were put in charge of the building projects around the country. Using standard plans, all types of buildings could be built in short time including barracks, mess halls, supply depots, chapels, and recreation buildings. Many of these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surfing
Surfing is a surface water sport in which an individual, a surfer (or two in tandem surfing), uses a board to ride on the forward section, or face, of a moving wave of water, which usually carries the surfer towards the shore. Waves suitable for surfing are primarily found on ocean shores, but can also be found in standing waves in the open ocean, in lakes, in rivers in the form of a tidal bore, or in wave pools. The term ''surfing'' refers to a person riding a wave using a board, regardless of the stance. There are several types of boards. The Moche of Peru would often surf on reed craft, while the native peoples of the Pacific surfed waves on alaia, paipo, and other such water craft. Ancient cultures often surfed on their belly and knees, while the modern-day definition of surfing most often refers to a surfer riding a wave standing on a surfboard; this is also referred to as stand-up surfing. Another prominent form of surfing is body boarding, where a surfer rides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaches Of Marin County, California
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] |
The Marine Mammal Center
The Marine Mammal Center (TMMC) is a private, non-profit U.S. organization that was established in 1975 for the purpose of rescuing, rehabilitating and releasing marine mammals who are injured, ill or abandoned. It was founded in Sausalito, California, by Lloyd Smalley, Pat Arrigoni and Paul Maxwell. Since 1975, TMMC has rescued over 24,000 marine mammals. It also serves as a center for environmental research and education regarding marine mammals, namely cetaceans (whales, dolphins and porpoises), pinnipeds (seals, fur seals, walruses and sea lions), otters and sirenians (manatees and dugongs). Marine mammal abandonment refers to maternal separation; pups that have been separated from their mother before weaning. At the center, they receive specialized veterinary care: they are diagnosed, treated, rehabilitated and ideally, released back into the wild. Animals in need of assistance are usually identified by a member of the public who has contacted the center. These animals represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosco Busan
''Hanjin Venezia'', formerly named the ''Cosco Busan'', is a container ship. On 7 November 2007, it collided with the protective fender of the Delta Tower of the San Francisco–Oakland Bay Bridge in heavy fog. The collision sliced open two of its fuel tanks and led to the Cosco Busan oil spill in San Francisco Bay. She was renamed the ''Hanjin Venezia'' after the accident. The vessel was initially built in 2001 by Hyundai Heavy Industries at Ulsan, South Korea. In December 2001, the vessel was placed under long-term charter to Hanjin Shipping Co., Ltd. of Seoul, South Korea and named ''Hanjin Cairo.'' The vessel called on various ports of Europe, Asia, and along the West Coast of the United States, specifically the Ports of Long Beach and Oakland, California. In November 2006, the ship's owners renamed the vessel from the ''Hanjin Cairo'' to the ''Cosco Busan.'' After a 3-year absence from U.S. ports, the ''Cosco Busan'' called upon the Port of Long Beach on December 29, 2006 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark Attack
A shark attack is an attack on a human by a shark. Every year, around 80 unprovoked attacks are reported worldwide. Despite their rarity, many people fear shark attacks after occasional serial attacks, such as the Jersey Shore shark attacks of 1916, and horror fiction and films such as the ''Jaws'' series. Out of more than 489 shark species, only three of them are responsible for a double-digit number of fatal, unprovoked attacks on humans: the great white, tiger, and bull.ISAStatistics on Attacking Species of Shark/ref> The oceanic whitetip has probably killed many more castaways, but these are not recorded in the statistics. Terminology While the term "shark attack" is in common use for instances of humans being wounded by sharks, it has been suggested that this is based largely on the assumption that large predatory sharks (such as great white, bull, and tiger sharks) only seek out humans as prey. A 2013 review recommends instances where a shark clearly predates on a huma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chert
Chert () is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a precipitation (chemistry), chemical precipitate or a diagenesis, diagenetic replacement, as in petrified wood. Chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean floor, and which contains the silicon skeletal remains of diatoms, Dictyochales, silicoflagellates, and radiolarians. Precambrian cherts are notable for the presence of fossil cyanobacteria. In addition to Micropaleontology, microfossils, chert occasionally contains macrofossils. However, some chert is devoid of any fossils. Chert varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty redW.L. Roberts, T.J. Campbell, G.R. Rapp Jr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunbathing
Sun tanning or tanning is the process whereby skin color is darkened or tanned. It is most often a result of exposure to ultraviolet (UV) radiation from sunlight or from artificial sources, such as a tanning lamp found in indoor tanning beds. People who deliberately tan their skin by exposure to the sun engage in a passive recreational activity of sun bathing. Some people use chemical products which can produce a tanning effect without exposure to ultraviolet radiation, known as sunless tanning. Impact on skin health Moderate exposure to direct sunlight contributes to the production of melanin and vitamin D by the body, but excessive exposure to ultraviolet rays has negative health effects, including sunburn and increased risk of skin cancer, as well as depressed immune system function and accelerated aging of the skin. Some people tan or sunburn more easily than others. This may be the result of different skin types and natural skin color, and these may be a result of gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baymouth Bar
A baymouth bar is a deposition (sediment), depositional feature as a result of longshore drift. It is a bar (landform), sandbank that partially or completely closes access to a bay. Background These bars usually consist of accumulated gravel and sand carried by the current of longshore drift and deposited at a less turbulent part of the current. Thus, they most commonly occur across artificial bay and river entrances due to the loss of kinetic energy in the current after wave refraction. References Spits (landform) Coastal and oceanic landforms Coastal geography {{marine-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marin County, California
Marin County is a County (United States), county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 262,231. Its county seat and largest city is San Rafael, California, San Rafael. Marin County is across the Golden Gate Bridge from San Francisco, and is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area. Marin County's natural sites include the Muir Woods Sequoia sempervirens, redwood forest, the Marin Headlands, Stinson Beach, CA, Stinson Beach, the Point Reyes National Seashore, and Mount Tamalpais. As of 2019, Marin County had the sixth highest income per capita of all U.S. counties, at $141,735. The county is governed by the Marin County Board of Supervisors. The Marin County Civic Center was designed by Frank Lloyd Wright and draws thousands of visitors a year to guided tours of its arch and Atrium (architecture), atrium desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagoon
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') and ''atoll lagoons''. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around many parts of the world. Definition and terminology Lagoons are shallow, often elongated bodies of water separated from a larger body of water by a shallow or exposed shoal, coral reef, or similar feature. Some authorities include fresh water bodies in the definition of "lagoon", while others explicitly restrict "lagoon" to bodies of water with some degree of salinity. The distinction between "lagoon" and "estuary" also varies between authorities. Richard A. Davis Jr. restrict ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
