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Gulf of Mexico

geography Maturity 5-7 Next article →

The Gulf of Mexico is a huge body of water. It is an oceanic basin and a marginal sea of the Atlantic Ocean.

Gulf of Mexico with ship
Gulf of Mexico with ship

Most of the gulf is surrounded by the North American continent. The United States sits to the north and northwest. The Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and Quintana Roo are to the south and southwest. Cuba sits near the southeast corner.

Northern Gulf of Mexico map
Northern Gulf of Mexico map

The basin has an oval shape. It connects to the Atlantic Ocean through the Straits of Florida. It also connects to the Caribbean Sea via the Yucatán Channel. Because these connections are narrow, the tidal ranges are very small.

Deep under the waves, the seafloor is made of rocks and sediments.

Caribbean Sea Gulf of Mexico shaded relief bathymetry land map
Caribbean Sea Gulf of Mexico shaded relief bathymetry land map

The basin is divided into different areas. About 32% of the gulf is the continental shelf. Another 41% is the continental slope. The rest is the abyssal plain. The deepest part of the whole basin is the Sigsbee Deep. This spot reaches a depth of 12,467 feet.

Sediment in the Gulf of Mexico
Sediment in the Gulf of Mexico

You can also find strange brine pools on the floor. These are like underwater lakes made of very salty water. This brine is much denser than the regular seawater around it. It stays in deep holes on the gulf floor.

This place has many different names in history. The Aztecs called it the 'House of Chalchiuhtlicue' after their sea deity. They even called the sea 'sky water' because it looked like the sky.

Mount & Page Chart of the Bay of Mexico 1700 UTA
Mount & Page Chart of the Bay of Mexico 1700 UTA

The Maya people likely called it 'great water' for trade. European explorers used many names too. Hernán Cortés called it the 'Sea of the North.' Other maps called it the 'Gulf of Florida' or the 'Gulf of Cortés.' The name 'Gulf of Mexico' appeared on maps around 1550. This name became the most common one by the mid-17th century.

Life around the gulf is very busy. Many people live near the water. About 15.8 million people live in the U.S. coastal region. Major cities there include Houston, New Orleans, Mobile, and Pensacola.

Verner Moore White - The Harbor at Galveston
Verner Moore White - The Harbor at Galveston

In Mexico, about 19.1 million people live in the states facing the gulf. Cuba also has about 3.2 million people living near its borders. The gulf is also very important for energy. It is a top place for finding petroleum. In fact, it provides 14% of all petroleum produced in the United States.

15-07-14-Yucatan-Ölfelder-RalfR-WMA 0481
15-07-14-Yucatan-Ölfelder-RalfR-WMA 0481

The gulf also plays a big role in our weather. Moisture from the water moves into the air. This moisture helps create weather across the United States. It can even lead to severe weather in Tornado Alley.

Loop current2
Loop current2

The geology of the area is also very old. The gulf began to take shape about 300 million years ago. It was created when the giant supercontinent called Pangaea began to break apart. This movement of the Earth's plates stretched the crust and created the basin. Over a long time, the sea flooded the area to create the gulf we see today.

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🖼️ Images & Media (16)
File:Mount & Page Chart of the Bay of Mexico 1700 UTA.jpg
Mount & Page Chart of the Bay of Mexico...
File:The English pilot. (cartographic material) - The fourth book. Describing The West-India navigation, from Hudson's Bay to the River Amazones. Particularly delineating The Sea Coasts, Capes, Headlands, (14780240045).jpg
The English pilot. (cartographic...
File:U.S. Geological Survey map of the Gulf of America, 2025.jpg
U.S. Geological Survey map of the Gulf of...
File:Verner Moore White - The Harbor at Galveston.JPG
Verner Moore White - The Harbor at Galveston.JPG
File:Gulf of Mexico with ship.jpg
Gulf of Mexico with ship.jpg
File:15-07-14-Yucatan-Ölfelder-RalfR-WMA 0481.jpg
15-07-14-Yucatan-Ölfelder-RalfR-WMA 0481.jpg
File:Sediment in the Gulf of Mexico.jpg
Sediment in the Gulf of Mexico.jpg
File:Loop current2.jpg
Loop current2.jpg
File:Mississippiriver-new-01.png
Mississippiriver-new-01.png
File:Northern Gulf of Mexico map.png
Northern Gulf of Mexico map.png
File:Wide natural beach near Sabine Pass.jpg
Wide natural beach near Sabine Pass.jpg
File:Caribbean Sea Gulf of Mexico shaded relief bathymetry land map.png
Caribbean Sea Gulf of Mexico shaded...

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