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Geology

U=(N/T)M*G: Ground

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Lot of stuff happening here on Earth. We’ve got all eyes on every corner of out little mud ball and it’s a pretty mixed bag of news. New variants and new launches to the ISS. Tardigrades and Bezos in space. Hell, we’ve even got Disney cycling back to their evil empire ways. So I’m gonna change pace a little and direct your eyes, or thoughts anyway, over to the ground game of two other planets. Yep. Our neighbors, Mars and Venus. Sure, their parties are a little more subdued than ours currently, but they’re still partying. Well, I say subdued, … Read more

When the Atlantic Was a Buried, Freshwater sea

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Atlantic Sea

The Arctic Ocean was once a pool of fresh water capped with an ice shelf half as thick as the Grand Canyon is deep. If that’s hard to envision, don’t despair. Scientists were surprised at the discovery, published Wednesday (Feb. 3) in the journal Nature, as well. The trick to envisioning this odd arrangement is to think about the relationship between ice sheets and the ocean. When ice sheets melt, they dump water into the ocean, raising the sea level. But when ice sheets grow, as they have during Earth’s glacial periods, sea level drops. Now, new research shows that … Read more

Earth’s 200 Million Year Growth Spurt

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Earth's Core - Deposit Photos

Around 3 billion years ago, Earth’s crust ballooned during a massive growth spurt, geoscientists have found. At that time, just 1.5 billion years after Earth formed, the mantle — the layer of silicate rock between the crust and the outer core that was more active in the past — heated up, causing magma from that layer to ooze into fragments of older crust above it. Those fragments acted as “seeds” for the growth of modern-day continents. The researchers found evidence for this growth spurt hiding in ancient zircon crystals in stream sediments in Greenland. These extremely durable crystals — made … Read more