50 Fun Facts About Gulf of Mexico

The Gulf of Mexico is a marginal sea of which ocean?

Its connections to the open ocean are so narrow that its tides are tiny.

Which island nation bounds the Gulf on its southeast?

Its three westernmost provinces, including Havana, have a combined population of about 3.2 million.

The Gulf connects to the open ocean through which strait?

The strait is only about 900 metres deep at most, so exchange with the ocean happens in the upper layers.

Water enters the Gulf from the Caribbean Sea through which passage?

The current through it can reach 120 centimetres per second and fills the channel to a depth of about 800 metres.

Moisture from the Gulf is a primary factor in severe weather in which famously storm-prone US region?

Dry air from the Rockies collides with the Gulf moisture to build the supercells that spawn the region's violent twisters.

Roughly how large is the Gulf of Mexico basin?

Almost half of that area is shallow continental shelf, and the whole basin holds about 2.4 million cubic kilometres of water.

In the early 2020s, the Gulf accounted for roughly what share of US crude oil production?

By 1975 there were 400 rigs hosting more than 10,000 workers on any given day, though automation later thinned the offshore workforce.

The Aztecs named the Gulf the 'House of Chalchiuhtlicue', after their deity of what?

They believed sea and sky merged at the horizon and called the seas ilhuicaatl, 'sky water'.

The Maya, who used the Gulf as a major trade route, likely called it nahá, meaning what?

Maya traders paddled long canoes carved from single mahogany trunks and navigated by coastal landmarks and lookout towers.

What did Hernán Cortés call the Gulf in his dispatches?

Other Spaniards preferred 'Gulf of Florida', and Abraham Ortelius' 1584 map still used the same northern label.

In which year did the name 'Gulf of Mexico' first appear on a world map?

Europeans named it after the land of the Mexica because mariners had to cross it to get there; it became the usual name by the mid-17th century.

A January 2025 US executive order directed agencies to adopt which name for the gulf bounded by the United States?

Mexican president Claudia Sheinbaum objected, and a Marquette University poll found 71% of Americans opposed the change.

Which body officially recognises the name Gulf of Mexico and includes all three bordering countries?

There is no formal protocol for naming international waters, so its standardisation is only for certain purposes.

How many US states border the Gulf of Mexico?

Florida, Alabama, Mississippi, Louisiana and Texas; in 2016 the region held 15.8 million people.

How many Mexican states have a Gulf coastline?

Together they hold 19.1 million people, more than the US Gulf Coast region.

The Gulf of Mexico took shape roughly how long ago as a result of plate tectonics?

Before the late Triassic the area was dry land in the middle of Pangaea; rifting later flooded it into an enclosed sea.

Which Jurassic evaporite formation under the northern Gulf produces its brine pools and diapirs?

Under the pressure of overlying sediment the salt flows and rises, a process called salt tectonics.

The Gulf's greatest depth is found in which feature?

The Gulf floor is 41% continental slope, 32% shelf and only 24% abyssal plain.

How deep is the Gulf of Mexico at its deepest point?

That is about 3,800 metres, deep enough that its central floor is true abyssal plain.

A Gulf-floor brine pool found in 2014 was nicknamed the 'Jacuzzi of Despair' because it is what?

At 18 °C against 4 °C around it, and several times saltier, it can only support bacteria, symbiotic mussels, tube worms and some shrimp.

The Orca Basin brine pool, formed by several merged salt domes, reaches what salinity at depth?

Normal seawater averages 35 ppt; the pool covers about 400 square kilometres and has zero dissolved oxygen.

The Loop Current that dominates the Gulf circulates in which direction?

It is as strong as the current it feeds, up to 300 kilometres across, and sheds warm rings that drift west at about 0.2 knots.

The Florida Current, exiting through the Florida Straits, becomes which famous ocean current?

The whole system is part of the North Atlantic Gyre along with the North Atlantic, Canary and North Equatorial currents.

About 40% of the water flowing into the Gulf from the Caribbean originally comes from where?

That component is warmer and fresher, and a deeper layer of the current is Antarctic Intermediate Water.

Which civilisation built cities such as San Lorenzo Tenochtitlán on the Gulf's southern coast around 1200-400 BC?

They relied on fishing, turtles and the floodplain while gradually farming more maize.

Who discovered the Yucatán Peninsula for Spain in 1517?

He died the same year of wounds and thirst from the voyage, bitter that Grijalva had been given the follow-up expedition.

A Spanish treasure ship was wrecked on which part of the Texas coast, prompting a famous salvage effort?

The loss helped convince Spain to plant a settlement on the northern Gulf coast to protect shipping and rescue castaways.

The expedition of Tristán de Luna y Arellano landed in 1559 at which bay?

It came out of a plan to establish a northern Gulf settlement after a string of ship disasters.

In February 1699 d'Iberville went ashore with his teenage brother at what is now which Mississippi city?

The brother, Jean-Baptiste Le Moyne de Bienville, was left as second in command and later founded New Orleans.

The French fort at the mouth of the Mississippi was named La Balize, which means what?

The first permanent settlement, Fort Maurepas, is now Ocean Springs, Mississippi.

The US portion of the Gulf coastline receives water from 33 major rivers draining how many states?

The same rivers also drain two Canadian provinces, which is why farm runoff from the Midwest ends up in the Gulf.

Along with the Mississippi and Rio Grande, which pair of rivers empties into the southern Gulf?

The earliest great Mesoamerican civilisation built its river cities along waterways flowing into the same southern bight.

What magnitude was the unusual intraplate earthquake recorded in the Gulf on September 10, 2006?

It was felt from Louisiana to Florida and set off seiches in swimming pools, but caused no damage.

The mystery shipwreck now called the Mardi Gras was found in 2002 by whom?

The early-19th-century vessel lies in 1,200 metres of water off Louisiana and was excavated in 2007 by Texas A&M.

Which German submarine torpedoed the SS Robert E. Lee in the Gulf of Mexico in 1942 and was sunk minutes later?

The escort PC-566 depth-charged it; the wrecks were found in 2001 only about three kilometres apart.

Which now-extinct marine mammal once lived in the Gulf of Mexico?

The Gulf's resident Bryde's whales were recently classed as a unique subspecies and rank among the world's most endangered whales.

Roughly how many abandoned oil and gas wells lie beneath the Gulf?

They have generally never been checked for environmental problems.

The Gulf's hypoxic 'dead zone' runs east-west along the coastline of which two states?

Fed by farm nitrogen and phosphorus, it hit a record 22,730 square kilometres in 2017.

The Gulf's largest oil spill before 2010 began in June 1979 at which platform?

The blowout in the Bay of Campeche was not capped until April 1980, ten months later.

On what date did the Deepwater Horizon platform explode?

The rig sat about 64 kilometres off Louisiana, with the wellhead 1.5 kilometres below the surface.

The Deepwater Horizon well was drilled on which oil prospect?

The spill is estimated to be 8 to 31 percent larger than the previous record holder, which was also in the Gulf.

The US federal government estimated the total Deepwater Horizon discharge at how many barrels?

The well was not declared sealed until 19 September 2010, and reports in 2012 said the site was still leaking.

How many workers died in the Deepwater Horizon explosion?

The operator pleaded guilty to felony counts related to the deaths and paid a $4 billion fine in 2012.

The Gulf's summer sea surface temperature, which fuels hurricanes, averages around what?

Because the Gulf is shallow, the water re-warms quickly after a storm passes, so one hurricane can follow another.

From 1970 to 2020, how did the Gulf's sea-surface warming compare with the world ocean's?

That works out to about 1 °C over the half-century, or 0.19 °C per decade.

Hurricane Katrina peaked over the Gulf as a Category 5 storm with sustained winds of what speed?

It weakened to Category 3 before landfall near Buras-Triumph, Louisiana, on August 29, 2005, and remains the costliest US tropical cyclone.

The Chicxulub impact crater on the Gulf's southern rim was made by an asteroid about how wide?

The crater it left is about 200 kilometres across and buried a kilometre deep beneath younger rock.

The Chicxulub crater was first identified by geophysicists who were looking for what?

Glen Penfield gave up trying to prove it was a crater until Alan Hildebrand's samples in 1990 showed shocked quartz and tektites.

The Gulf yields more fish, shrimp and shellfish each year than which combined set of US fishing regions?

Major catches include red snapper, amberjack, tilefish, swordfish and grouper, plus shrimp, crabs and oysters.

Warm Gulf waters meeting winter cold fronts give it one of the ocean's highest rates of what?

In summer the storms drifting offshore from the southern US keep the tally high.