These layers of mud and sand act like a historical record, revealing the river’s past. Geological Evidence and Age Estimates Sediment Cores and Fossil Analysis To answer how old is the Amazon River, researchers drill into the riverbed and analyze sediment cores.
Amazon Riverbed Age: Tracing the Geological and Biodiversity History
Biodiversity and the Ancient Flow. Paleogene 66 – 23 Initial river networks begin to form.
During the Ice Ages, sea levels dropped, and the Amazon Basin experienced extreme dry periods. The river did not flow continuously in its modern form.
Amazon Riverbed Age Unveiling Ancient Geological Evidence and Biodiversity
01 Glacial cycles influence the river’s path and tributaries. During the Cretaceous period, around 145 to 66 million years ago, a network of rivers drained the western interior of what is now South America.
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