Tag Archives: Planetary science

Banded Iron Formations Have Microbial Link?

A pair of mineral clues recently found in a fossil seafloor may be signs that ancient bacteria helped create banded iron formations — Precambrian-aged sedimentary rocks known for their vibrant, reddish- brown-colored thin layers — that researchers use to reconstruct ancient interactions between the atmosphere, the ocean and the seafloor.

Modern Tools Reveal World War I Tunneling Tricks

On the battlefields of the Somme, history and geology meld. Beneath the chalky earth, men carved messages, memorials and poems into the walls of tunnels that were dug almost a century ago during the First World War. Explosions in the tunnels buried countless men and reshaped the surface, where grass and trees now soften the cratered landscape. Many of the soldiers’ bodies — and their words — remain buried. Continue reading Modern Tools Reveal World War I Tunneling Tricks

Greenland ice-melt map gets the cold shoulder

Glaciologists and climatologists are racing to correct an error in the latest edition of The Times Comprehensive Atlas of the World, which they say overstates the extent of ice loss in Greenland over the past 12 years.

The 13th edition of the atlas was released on 15 September. The map’s publisher, London-based HarperCollins, said in a press release that it had “had to erase 15% of Greenland’s once permanent ice cover” since the previous edition in 1999. But researchers, who contend that the number is not backed up by scientific evidence, are worried that the error will undermine their credibility. Continue reading Greenland ice-melt map gets the cold shoulder

Caves of Ice: The Next Frontier in Paleoclimatology?

It’s early June in the Austrian Alps. Tourists in shorts sweat their way up a trail from the cable car above Lake Hallstatt. But the summer heat doesn’t stop a group of scientists from pulling on brightly colored jumpsuits over their hiking clothes at the entrance to Mammuthohle, one of the many limestone caves that riddle the Dachstein Massif. Lukas Plan, a geophysicist at the University of Vienna, straps on his headlamp and pauses to warn the crowd of researchers about the cave they are about to enter. It won’t just be chilly inside, he cautions; it will be an Alpine meat locker.

The crowd, part of the fourth international ice cave workshop organized by a network of European geophysicists and glaciologists, is gathered to visit the cave’s year-round ice formations.

Plan turns toward the tunnel in the mountainside and opens the metal door. A rush of wind bursts out. The group prepares to enter, hoping to read the history of the region’s climate in the cave’s ice.

Continue reading Caves of Ice: The Next Frontier in Paleoclimatology?