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Articles tagged with: geology

Written By: grant on October 12, 2014 No Comment
Science Art: <i>Phramgocone of Belemnitella, In Flint</i>, 1851

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A “phragmocone” is a fancy word for a shell of a nautilus or ammonoid, and “Belemnitella” is a genus of belemnite, which is to say, a prehistoric critter like squid with a long, chambered shell… that it kept inside, like a skeleton.

Once upon a time, they were all [...]

Written By: grant on October 6, 2014 No Comment

Daily Beast has more on how 204 billion tons of melting glaciers have changed the way our planet’s gravity works:

Between 2009 and 2012, the years for which GOCE was taking data, the amount of gravity in Antarctica decreased noticeably, corresponding to a lot of ice melt.

From the point of view of artificial satellites [...]

Written By: grant on August 31, 2014 No Comment
Science Art: <i>Urban Expansion of Shenyang, China</i>, 2014.


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This is a story of explosive growth, as told by the USGS Landsat satellite, and recorded in the Earth Earth Resources Observation and Science (EROS) Center “Image of the Week” collection.

On the left is Shenyang in 1984. On the right, the same location 30 years later. City is spreading like… [...]

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Written By: grant on August 29, 2014 No Comment

You might have heard, like many Discovery News readers, of the weird moving rocks of Death Valley – the ones with the long, curving trails behind them. No one’s ever seen how these huge boulders skate across the desert until now:

The first witnesses to an enduring natural mystery are an engineer, a biologist [...]

Written By: grant on August 5, 2014 No Comment

Nature offers one of the least comforting explanations for a mysterious hole in Siberia. It wasn’t from an asteroid or a rogue telephone-pole-installing crew. The 30-meter-wide crater was caused by methane – a flammable, stinky greenhouse gas – being released from melting permafrost:

Over the past 20 years, permafrost at a depth of 20 [...]

Written By: grant on July 29, 2014 No Comment

Nature shares satellite data that shows not only lakes, rivers and reservoirs shrinking across the whole U.S. Southwest, but even water underground is going away:

To track groundwater losses, researchers used data from the Gravity Recovery and Climate Experiment (GRACE), a pair of satellites operated by NASA and the German Aerospace Centre (DLR) that measure [...]

Written By: grant on June 8, 2014 No Comment
Science Art: <i>“Dolerite” Dyke Traversing “Desert Sandstone”</i>, 1872.


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From the Quarterly Journal of the Geological Society of London, volume 28.

It’s a dyke, a rock formation between two layers of Australian rock like jam in a sandwich.

This seems like a great place to find fossils or “vein-stones,” but the London geologists said, “No. No, it isn’t.”

It’s just

Written By: grant on January 27, 2014 No Comment
Science Art: <i>Cuesta de Viento Reservoir, Argentina</i>, by USGS Earth Resources Observation and Science (EROS) Center.


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This is the EROS image of the week, because the U.S. Geological Survey believes in science-as-art, too.

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Written By: grant on January 7, 2014 No Comment

Nature looks at the widening gap in understanding earthquake lights… not a gap in our knowledge, but in the ground, as fault lines pull apart to create eerie lights before quakes:

A new catalogue of earthquake lights — mysterious glows sometimes reported before or during seismic shaking — finds that they happen most often [...]

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