Subterranean Amazon river 'is not a river'

[Ian Pegler]

from the BBC...

Subterranean Amazon river 'is not a river'

A subterranean river said to be flowing beneath the Amazon region of Brazil is not a river in the conventional sense, even if its existence is confirmed.

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Ian

[Grahame]

Found a bit more on this here.

Scientists detected this river after they analyzed data from 241 wells that Brazilian oil company Petrobras drilled in the Amazon region in the 1970s and 1980s. The river was unofficially named the Hamza by scientists at Brazil's National Observatory in honor of their colleague, geophysicist Valiya Hamza.

"The name given to the underground flow is not official," Hamza said.

Thermal signatures of groundwater suggest that the Hamza flows west to east just like the Amazon, except at a depth of about 13,000 feet (4,000 meters) below the Earth's surface. Computer simulations suggest that at a higher depth of about 2,000 feet (600 meters), the river actually flows vertically.