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Glacial records depict ice age climate in synch worldwide

MADISON - An answer to the long-standing riddle of whether the Earth's ice ages occurred simultaneously in both the Southern and Northern hemispheres is emerging from the glacial deposits found in the high desert east of the Andes.

Using a new technique to gauge the effects of cosmic rays on minerals found in boulders carried by South American glaciers thousands of years ago, a group of s......

Full article >>> and worked under the direction of UW-Madison geology professor Brad Singer, collected samples of quartz and other minerals from boulders found on the crests of the moraines that mark the waxing and waning of mountain glaciers in the Andes Mountains of Argentina.

Using a technique to read the changes imposed by cosmic rays - charged, high-energy particles that bombard the Earth from outer......

Full article >>> t of phase in terms of the amount of solar radiation they receive, it is surprising to find that the climate in the Southern Hemisphere cooled off repeatedly during a period when it received its largest dose of solar radiation," says Singer. "Moreover, this rapid synchronization of atmospheric temperature between the polar hemispheres appears to have occurred during both of the last major ice ages......

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'"/> By Terry Devitt 03/22/04

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