Researchers on an expedition in the Amazon River Delta have found mangroves growing in freshwater — a phenomenon never before documented in deltas or coastal mangroves anywhere else in the world.

A vast floodplain 10 times the size of the Amazon delta existed ... this with seismic data to map the rock layers. The team found preserved sediments from a delta that existed 237 to 227 million ...

The expedition has already secured some prestigious partnerships: support from the Explorers Club, an IMAX deal for a related film production and an assignment to produce a new Amazon river map ...

Then, in 1971, a National Geographic expedition led by Loren McIntyre identified the snow-capped peak of Mismi (map) as the headwaters of the Apurímac River and the ultimate source of the Amazon.

About one-sixth of all the freshwater flowing into the sea passes through the Amazon delta, which spans up to 320 km wide before flowing into the Atlantic Ocean. The size of the river varies depending ...