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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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Author Archives: Chris Rowan
Remagnetisation spoils the paleomagnetic party again
Did the Earth have a magnetic field before 3.5 billion years ago? Previous paleomagnetic studies of the world’s oldest mineral grains – the Jack Hills zircons, which have maximum ages of 4.4 billion years – claimed that tiny inclusions of … 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
New sonar data from around Anak Kratatau constrain size of December 2018 collapse
BBC story here. These data indicate a smaller collapse, but also a shallower failure plane than expected, which allowed that smaller volume to still generate a devastating tsunami. Basically, when modelling this, different combinations of slide volume and failure angle … 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
Nice plan for content warnings on Mastodon and the Fediverse. Now you need a Mastodon/Fediverse button on this blog.