News tagged with ancient rocks

Paleomagnetists put controversy to rest

(PhysOrg.com) -- Princeton University scientists have shown that, in ancient times, the Earth's magnetic field was structured like the two-pole model of today, suggesting that the methods geoscientists use ...

Oct 02, 2009
4.6 / 5 (12) 0

New technique unlocks secrets of ancient ocean

Earth's largest mass extinction event, the end-Permian mass extinction, occurred some 252 million years ago. An estimated 90 percent of Earth's marine life was eradicated. To better understand the cause of ...

Oct 11, 2011
4.8 / 5 (10) 0 | with audio podcast

Bias in the rock record?

(PhysOrg.com) -- The fossil record is known to be biased by the unevenness of geographical and stratigraphical sampling, and the lack of exposed rocks containing fossils. In a recent Perspective in Science [2 Jan ...

Jan 14, 2009
4.1 / 5 (8) 0