Wednesday, December 17, 2014
Wednesday, December 10, 2014
Wednesday, December 03, 2014
Wednesday, November 26, 2014
The cratered lunar face preserves the song
Of bolide roller derbies eons past
But while the cold dead moon remembers long
The rains of Earth reshape the surface fast.
Did impacts peak four billion years ago?
Or taper off through geologic time?
Archean rocks are analysed to know
micaceous balls were hot glass in their prime.
This impact melt was blasted into space
By comets larger than the dino's doom.
Thus diminution models must replace
The cut-off LHB has us presume.
Can cratering effect how cratons grow?
Tectonic orogens changed status quo.
Geology 42 747
Thursday, November 20, 2014
Wednesday, November 19, 2014
Sunday, November 16, 2014
Posted by Chuck Magee at 11:25 PM
Wednesday, November 12, 2014
The Vikings lived in Greenland 'till in cooled.
Ten thousand years before, as glac'ers thawed,
Melt water in the North Atlantic pooled,
The Younger Dryas cold snap shocked and awed.
In Norway, glaciers reappeared on high,
Above the fjords where stoic Norse rule lapsed.
Then Carolina icebergs floated by,
As Greenland outlet glaciers collapsed.
Why would cold make this icecap melt, not grow?
Emotionless wind froze the Baffin Bay.
Warm currents thawed the ice tongues from below;
Without a shelf, the glac'er sped away.
Today such currents threaten the Antarctic
An outburst would be deluge, not cathartic.
Geology 42 759