Placer (Portuguese: parcel or pracel) is a term used by Spanish and Portuguese navigators and cartographers to refer to a certain kind of submerged bank or reef. Commonly the bottom of such a reef is sandy, but there are some where the bottom is muddy or stoney. Although most reefs designated as placer are flat and shallow, exceptionally there are some that do not share those characteristics and are known as placer acantilado. A placer usually provides an anchorage for seagoing vessels.
Spanish navigator and explorer Pedro Sarmiento de Gamboa commented that placer likely originated as a term derived from placer mining in the Antilles, where pearl fishing was done mostly on shallow sandy reefs, which were compared to the sandy grounds in rivers where gold nuggets were found.
Since the word Placer in Spanish means 'pleasure', according to 16th century scientist Juan Pérez de Moya a placer is every dangerous submerged shallow bank. Moya claims that the landforms that received this denomination did so in an ironical manner, for it would be everything but a pleasure to navigate those treacherous waters under the constant risk of running aground. However, other navigators contradict Moya by claiming that such a shallow ground would provide mariners with a much welcome anchorage after a long open sea journey, for in some placeres the waters are not as rough as in the open seas.
The term appears in Spanish nautical charts as placer, although Pedro Sarmiento de Gamboa writes it as placel. The Portuguese language equivalent and derived term is pracel or parcel. In present times some of the geographical names used by the Spanish cartographers, such as Placer de los Colorados, Placer de los Estudios, Placer de Playa Grande, Placer de Montechristi, Placer de Quatro Cayos, Placer de la Gallega, Placer de las Tortugas and Placer de los Siete Hermanos have become obsolete or have been superseded by English terms. Still, many other placeres mentioned in 19th-century Spanish Navigation Instruction Manuals were not even named. Not all placeres are in the open sea; the Isla Cangrejos in the Orinoco Delta was described as having a placer that stretched from its NE point composed of ground-coffee coloured hard sand.
The Abrolhos Archipelago (Portuguese: Arquipélago de Abrolhos) are a group of 5 small islands with coral reefs off the southern coast of Bahia state in the northeast of Brazil, between 17º25’—18º09’ S and 38º33’—39º05’ W. Caravelas is the nearest town. Their name comes from the Portuguese: abrolho ("Abre Olhos" meaning: Open your eyes), a rock awash or submerged sandbank that is a danger to ships. There is a conspicuous shipwreck in the group.Cay Sal Bank
Cay Sal Bank (Spanish: Placer de los Roques) is the third largest (after Great Bahama Bank and Little Bahama Bank) and the westernmost of the Bahama Banks. It is located between 23º27'N - 24º10'N and 079º25'W – 080º35'W. In a geographical sense, it is separate from the Bahamas proper as it is much closer to Cuba (from which it is separated by Nicholas Channel, at a distance of 50 km (31 mi)) than to the closest Bahamanian island. It is separated by Santaren Channel from the Great Bahama Bank, the western rim of which is 50 km (31 mi) to the east. The Straits of Florida separate it from the United States mainland and the Florida Keys (Key Largo is 100 km (62 mi) to the north).
Administratively, the bank and its islands are part of Bimini district, the main islands of which are 150 km (93 mi) to the north. The closest point of any other named Bahamian land to the bank is Orange Cay (24°56′24″N 79°08′45″W), the southernmost island of the Bimini Chain. The distance between Orange Cay and the nearest dry land of Cay Sal Bank, the Dog Rocks, is 120 km (75 mi). The westernmost tip of Andros is the second closest point of land, approximately 145 km (90 mi) east of Cay Sal Bank.La Guaira Bank
La Guaira Bank (Spanish: Placer de la Guaira), is a large, completely submerged bank in Venezuela. It is located in the Caribbean Sea 20 km to the NNE off the northern shore of La Guaira.This reef has an excellent reputation for deep-sea angling. Currents create an upwelling of nutrients that attracts large pelagic fish such as sailfish, marlin, yellowfin tuna and mahi-mahi.Misteriosa Bank
The Misteriosa Bank (Spanish: Placer de la Misteriosa) is a submerged bank or atoll in the Caribbean Sea, located at 18°48′N 83°54′W – approximately equidistant from Mexico (380 km or 210 nmi), Honduras (345 km or 186 nmi) and Cuba (320 km or 170 nmi).Ocean bank
An ocean bank, sometimes referred to as a fishing bank or simply bank, is a part of the seabed which is shallow compared to its surrounding area, such as a shoal or the top of an underwater hill. Somewhat like continental slopes, ocean banks slopes can upwell as tidal and other flows intercept them, resulting sometimes in nutrient rich currents. Because of this, some large banks, such as Dogger Bank and the Grand Banks of Newfoundland, are among the richest fishing grounds in the world.
There are some banks that were reported in the 19th century by navigators, such as Wachusett Reef, whose existence is doubtful.Parcel
Parcel may refer to:
Parcel (package), sent through the mail or package delivery
Parcel (consignment), an individual consignment of cargo for shipment
Parcels (band), an Australian modern soul band
Placer (geography), parcel in Portuguese, a type of submerged bank or reef
Fluid parcel, a concept in fluid dynamics
Land lot, a piece of land
an object used in the game Pass the parcel
Parcel das Paredes is a large submerged bank in Brazil with an area of about 200 km2. It is a coralline structure located in the Atlantic Ocean off the shore near Caravelas, Bahia State.Placer
Placer may refer to one of the following:
Placer (geography), a submerged bank or reef.
Placer, rugby league football role.
Placer, a job title in the Pottery industry.Geographical names:
Placer, Masbate, Philippines
Placer, Surigao del Norte, Philippines
Placer, former name of Loomis, California
Placer County, California, United StatesReef
A reef is a bar of rock, sand, coral or similar material, lying beneath the surface of water.
Many reefs result from natural, abiotic processes—deposition of sand, wave erosion planing down rock outcrops, etc.—but the best known reefs are the coral reefs of tropical waters developed through biotic processes dominated by corals and coralline algae.
Artificial reefs (e.g. shipwrecks) sometimes have a role in enhancing the physical complexity of featureless sand bottoms, in order to attract a diverse assemblage of organisms, especially algae and fish.
Earth's largest reef system is the Great Barrier Reef in Australia, at a length of over 2,300 kilometres (1,400 miles).Rosalind Bank
Rosalind Bank, also called Rosalinda or Rosa Linda Bank (Spanish: Placer de Rosalinda), is a large, completely submerged bank or atoll that lies with its southern extremity 269 km (1677 mi) northeast of Cabo Gracias a Dios. It is the culmination of an area of coral reef some 300 km (186 mi) long that is stretching out eastward from Cabo Gracias a Dios. The bank area is part of an extensive structure that continues further east through Pedro Bank towards Jamaica and is known as Nicaragua Rise.