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The Authors
For lot's more videos on soil moisture topics, see Drs Selker and Or's text-book support videos https://www.youtube.com/channel/UCoMb5YOZuaGtn8pZyQMSLuQ/playlists
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Category Archives: geology
Why did North Carolina experience a magnitude 5.1 earthquake yesterday?
The location of this earthquake seems a little odd because North Carolina is about as far as it’s possible to get from an active plate boundary – thousands of km from the mid-Atlantic spreading ridge to the east and the … Continue reading
Older than the solar system
As Carl Sagan once said, “we are made of star stuff“: and here some of it is; mineral grains formed around distant suns, hundreds of millions of years before our solar system was born. These grains of silicon carbide were … Continue reading
Can we detect plate tectonics on exoplanets?
As celebrated in this Ars Technica piece, the 2010s was ‘the decade of the exoplanet’. Largely thanks to the Kepler telescope, the past ten years has seen an explosion in exoplanet discoveries. More than 4000 planets have now been identified orbiting other stars, … Continue reading
Oxygenation of Earth’s atmosphere may not have required a trigger event after all
In Earth history, there have been 3 abrupt jumps in atmospheric oxygen. A evolutionary or tectonic trigger is usually invoked, but a new study just published in Science suggests all you need is gradual oxidation of earth’s surface plus feedbacks … Continue reading
How long was the last magnetic reversal – and why might subducting slabs have had a say in what it looked like?
A new paper on the chronology of the last magnetic reversal concludes it took 20,000 yrs, and there were two distinct excursions – where the field becomes weak and disorganized, but it recovers without reversing polarity – before the main event about … Continue reading
Nice plan for content warnings on Mastodon and the Fediverse. Now you need a Mastodon/Fediverse button on this blog.