Behold an underwater river in Mexico’s Yucatan Peninsula! This river-like formation which is in a collapsed limestone cenote, is formed by a phenomenon known as ‘halocline’. In oceanography, a halocline is a subtype of chemocline caused by a strong, vertical salinity gradient within a body of water.
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Because salinity in contrast with temperature, affects the density of sea water, it can play a role in its vertical stratification. Increasing salinity by one kg/m3 results in an increase of seawater density of around 0.7 kg/m3.
In the middle of Mexico’s Yucatan Peninsula, there is an underwater River.
Called ‘Little Angel’
It’s a scientific anomaly
According to the photographer, ‘Little Angel’ is fresh water until a depth of about 29m. There’s then a 1m layer of hydrogen sulphide, below which the entire base of the cave is filled with a dense layer of saltwater 30m to 60m deep. This saltwater layer is the ‘river’.
You can experience this scientific phenomenon anywhere from $120.00 to $250.00 US.