How is it possible to have cataclysmic eruptions without any real cataclysm?
Tag: geology
Categories
Our water came from space dust
Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlike…
Sooo cooool 😯
Also a ton of Earth’s water is IN ROCKS 🤯
In 1800s, miners began working in exposed deposits of mud near the town of Messel, Germany. They were extracting oil from the rock and along with the oil, they found beautifully preserved fossils of animals from the Eocene. What happened to these Eocene animals? And why were their remains so exquisitely preserved?
Mazuku= ‘evil wind’ — lethal carbon dioxide cloud, often released from the bottom of a deep lake or from volcanoes
The hills and lakes of Seattle, Washington are a direct result of multiple Puget Lobe advances during the Ice Age. Beneath the drumlins, outwash, glacial troughs, and scattered glacial erratics lies the Seattle Fault, an active fault which has produced numerous magnitude 6 or higher earthquakes since the Ice Age.
Interstate 90 exposes much of this geology in its first few miles heading east from downtown. The freeway begins on old tidelands that were filled by early residents of Seattle. Hills composed of soft glacial deposits were moved and dumped into Elliot Bay to make new land for a growing city. Today’s SODO district – including stadiums for the Seattle Seahawks and Seattle Mariners – sits on filled tidelands that are especially prone to seismic shaking during the next big earthquake in the Puget Sound.
Tom Foster (https://hugefloods.com/) and Nick Zentner (Central Washington University) have been hiking together in Washington for years. ’Geology of Seattle’ is part of an “I-90 Rocks” video series.
Learned the reason everything in the Puget Sound is so north-south oriented: it’s a field of drumlins formed by the glaciers that at one point lay 3000′ thick over Seattle!
I always figured our yard was an old stream bed because of all the rocks but it’s totally glacial till 😂
It’s shocking how much of Seattle proper is built on fill 😳 South Seattle west of I-5! So, like, a lot (including the stadiums). As a born and raised Californian with a deeply rooted awareness of earthquake danger, my mind turns to liquifaction 😳
So much interesting geology in Washington! Snoqualmie Pass is different from most mountain passes, lacking a steep cirque on either side because of ice age glaciers weighing down the peaks (probably also explains why it’s a relatively low pass at 3000′). And a diverse blend of rocks – sandstone uplifted, magma chambers exposed, volcanic deposits, lots of cool stuff.
Gorgeous textures of geologic formations on Mars, courtesy of NASA / Jet Propulsion Lab / University of Arizona. These would make beautiful additions or backgrounds for artwork…
152 pages of this… What a bounty!
Beneath our feet, under trillions of tons of rock, lurk astonishing and deadly secrets. Earthquakes, tsunamis, volcanic eruptions are all driven by hidden forces deep inside our planet. Now, using the latest scientific data from sensors and surface scans, we can x-ray the earth to reveal the dangers locked inside our planet. Using thousands of sensors and state of the art surface scan information, for the first time, we can create x-rays of the deep interior of our planet.
Hit a little close to home. Being raised in California I know a fair bit about earthquakes but learned a few new things about the Cascadia subduction zone. DH bailed on the ending because it was getting pretty doom and gloom.
Categories
Watched Eons
Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” — right up to the end of the most recent Ice Age.
Watched like two hours of YouTube autoplay.
Learned about “snowball earth” theory, and competing thoughts about whether it preceded or followed”the great unconformity” of several million missing years of rock layers in the Grand Canyon.
Also learned that the Mediterranean dried up at one point in the past which led to the formation of salt glaciers / formations.