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News articles on Geology

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Mongabay.com news articles on geology in blog format. Updated regularly.

Geology, climate links make Guiana Shield region particularly sensitive to change
(6/14/2008) Soil and climate patterns in the Guiana Shield make the region particularly sensitive to environmental change, said a scientist speaking at a biology conference in Paramaribo, Suriname.


Earth's minerals kept CO2 levels in balance prior to humans
(4/28/2008) The natural feedback system that has kept Earth's atmospheric carbon dioxide levels finely-balanced for millions of years has been overwhelmed by fossil fuel combustion, reports a new study published in Nature Geoscience.


How Old Is the Grand Canyon?
(3/6/2008) The Grand Canyon began to open at least 17 million years ago, report researchers writing in the journal Science.


Cretaceous sea levels were 550 feet higher than today
(3/6/2008) Sea levels were 550 feet (170 m) higher in the late Cretaceous period, about 80 million years ago, than today, shows a new reconstruction of historic ocean basins published in the journal Science. The authors say the work may help model current global warming-driven sea level change.


Amazon river flowed into the Pacific millions of years ago
(10/24/2006) A new study adds further evidence the theory that the world's largest river, the Amazon, once flowed in the opposite direction, emptying into the Pacific Ocean. Researchers at the University of North Carolina at Chapel Hill (UNC) discovered "ancient mineral grains" in the central Amazon that could only have originated in now-eroded mountains that once existed in the central and eastern South America, not the more recently formed Andes in the west


Weight of flooded Amazon river causes Earth to sink 3 inches
(10/5/2005) As the Amazon River floods every year, a sizeable portion of South America sinks several inches because of the extra weight -- and then rises again as the waters recede, a study has found. This annual rise and fall of earth's crust is the largest ever detected, and it may one day help scientists tally the total amount of water on Earth.



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