Gulf of California
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:"''Sea of Cortez''" redirects here. For the book by [[John Steinbeck]], see [[The Log from the Sea of Cortez]].'' [[Image:Wpdms nasa topo gulf of california.jpg|300px|right|thumbnail|The Gulf of California (highlighted)]]
The '''Gulf of California''' (also known as the '''Sea of Cortez''' or '''Sea of Cortés''';
locally known in the [[Spanish language]] as '''Mar de Cortés''' or '''Mar Bermejo''' or '''Golfo de California''') is a body of water that separates the [[Baja California Peninsula]] from the [[Mexico|Mexican]] mainland. It is bordered by the [[States of Mexico|states]] of [[Baja California]], [[Baja California Sur]], [[Sonora]], and [[Sinaloa]]. The name "Gulf of California" predominates on most maps in English today. The name "Sea of Cortés" is the one preferred by most local residents. The Gulf opened up 5.3 million years ago, redirecting the flow of the [[Colorado River]]. Other rivers which also flow into the Gulf of California include the [[Fuerte River|Fuerte]], [[Mayo River, Mexico|Mayo]], Sinaloa, Sonora, and the Yaqui. Its surface area is about 160,000 [[square kilometre|km²]] (62,000 square miles).
==Geology==
The Gulf of California came into being as [[plate tectonics|tectonic forces]] rifted the [[Baja California Peninsula]] off of the [[North American Plate]] about 12 million years ago. As part of this process, the [[East Pacific Rise]] propagated up the middle of the Gulf along the seabottom. The Gulf would extend as far as [[Indio, California]] except for the tremendous [[delta]] created by the Colorado River. This delta blocks the sea from flooding the [[Mexicali]] and [[Imperial Valley (California)|Imperial Valleys]]. Volcanism dominates the East Pacific Rise. The island of [[Isla Tortuga]] is one example of this ongoing volcanic activity.<ref>
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== Fishery ==
[[Image:Giant pacific manta.jpg|left|frame|Giant Pacific Manta Ray]]
The narrow sea is home to a unique and rich ecosystem. In addition to a wide range of [[endemic (ecology)|endemic]] creatures, it hosts many migratory species, such as the [[humpback whale]], [[Gray Whale|California Gray Whale]], [[manta ray]] and [[Leatherback Sea Turtle]]. This region has historically been a magnet for world class sport [[fishing]] activities, with a rich history of sporting world records.
The region also has a rich history as a commercial [[fishery]]. Some authors have reported witnessing [[tuna]] schools more than 100 miles (160 km) long in this region. Some argue that this region is one of the few in the world that still has potential to open new commercial fisheries, because statistics show that the fishing resources are stable. But the data varies wildly according to the species being studied, and the Gulf's ability to recuperate after years of over fishing remains uncertain. Moreover, changes in terrestrial ecology, such as the vast reduction in flow from the Colorado River into the Gulf, have negatively affected fisheries, particularly in the northern region.
The Gulf of California sustains a large number of marine mammals, many of which are rare and endangered. Its more than 900 islands are important nesting sites for thousands of seabirds and its waters are a primary breeding, feeding, and nursing grounds for a myriad of migratory and resident fish species. For decades, the gulf has been a primary source of two of Mexico's leading marine resources, sardines and anchovies. Water pollution is a problem in the Gulf of California, but the more immediate concerns are overfishing and bottom trawling, which destroys eelgrass beds and shellfish.
Efforts by the Mexican government to create [[Conservation ethic|conservation]] zones have been hampered by lack of enforcement resources as well as a lack of a political consensus on this issue of conservation of the Gulf. The thousands of miles of coastline are remote and difficult to police, and the politically powerful commercial fishing industry has been slow to embrace even economically viable conservation measures, much less stricter measures of conservation. Conservation of the Gulf's fisheries and coastlines is also complicated by a long history of over-capitalization in the sector, and the direct, often negative impacts that conservation measures have on the livelihoods of Mexico's coastal inhabitants. At present, the Mexican government and business interests have promoted a macro-level, tourist development vision for the Gulf, whose impacts on ecology and society there are uncertain.
Coastal communities that are highly reliant on the sport fishing industry include [[San Felipe, Baja California|San Felipe]], [[San Carlos, Sonora]], [[Cabo San Lucas]], [[La Paz, Baja California Sur|La Paz]], [[Loreto, Baja California Sur|Loreto]], [[Guaymas]], and [[Mulegé]]. [[Mazatlán]], on the Mexican mainland's Pacific coast, depends on the sagging commercial fishery.
== Islands ==
The Gulf of California contains two large islands, the [[Isla Ángel de la Guarda]] and [[Tiburón Island]], as well as several smaller ones, including [[Isla Espiritu Santo]] and [[Isla Partida]] which is joined to it by a narrow isthmus. The beach at [[Ensenada Grande]], on Isla Partida, was named the most beautiful beach in Mexico and one of the most beautiful in the world by British publication, [[The Travel Magazine]].
=== Bathymetry ===
Depth soundings in the gulf have ranged from fording depth at the estuary near [[Yuma, Arizona]] to in excess of 3000 m in the deepest parts. [http://www.planeta.com/ecotravel/mexico/seacortez.html]
==References==
{{reflist}}
==External links==
* [http://www.wildstudies.com Wild Studies Baja Marine Extreme Educational Programs]
* [http://www.seaofcortez.org Sea of Cortez Expedition and Education Project]
* [http://www.seacortez.com Sea of Cortez Marine Life]
* [http://www.desertmuseum.org/center/seaofcortez/ Desert Museum]
* [http://www.cruisecortez.com Sea of Cortez Sailing]
{{World Heritage Sites in México}}
[[Category:Landforms of Mexico]]
[[Category:Colorado River]]
[[ca:Golf de Califòrnia]]
[[da:Cortezhavet]]
[[de:Golf von Kalifornien]]
[[et:California laht]]
[[es:Golfo de California]]
[[eo:Kalifornia Golfo]]
[[eu:Kaliforniako golkoa]]
[[fa:خلیج کالیفرنیا]]
[[fr:Golfe de Californie]]
[[ko:코르테스 해]]
[[id:Teluk California]]
[[it:Golfo di California]]
[[he:מפרץ קליפורניה]]
[[lt:Kalifornijos įlanka]]
[[nl:Golf van Californië]]
[[ja:カリフォルニア湾]]
[[no:Californiabukta]]
[[pl:Zatoka Kalifornijska]]
[[pt:Golfo da Califórnia]]
[[ro:Golful California]]
[[ru:Калифорнийский залив]]
[[sr:Калифорнијски залив]]
[[fi:Kalifornianlahti]]
[[sv:Californiaviken]]
[[th:อ่าวแคลิฟอร์เนีย]]
[[zh:加利福尼亚湾]]