Spelade
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One day, I (Chris) walked into class and announced that we were beginning plate tectonics. I was so excited to begin teaching this content. The response from my students was not at all what I expected. They let me know that they had all the plate tectonics they could handle in middle school and there wasn't anything left to learn. They knew the 3 basic types of plate boundaries (kind of) - divergent, convergent, and the T-one. I then started asking deeper level questions that tested their ability to apply this huge theory to make sense of the world around them.
During lunch that day, I began writing a series of questions about the unifying theory of plate tectonics. Needless to say, their understanding was skin deep and that's totally Okay. I wanted to show that we can take a basic understanding and use it to make so much more sense of our world.
That "event" gave me the idea to do a series on PlanetGeo covering a deep dive into plate tectonics. Jesse was not easy to convince. He felt like it was too massive. Anyway, I won and here comes the series. In this episode, we answer the following questions:
1. How does plate tectonics explain the formation of basalt?
2. How does plate tectonics explain the formation of andesite?
3. How does plate tectonics explain the formation of granite?
We hope you enjoy!
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Website: https://planetgeocast.com/Download the CampGeo app now at this link.
On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!
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An overview of the underlying mechanisms of pain, including the role of nociception, transduction of nociceptor signals by spinal pathways, the modulatory effects of opioids, and processing of these inputs in the brain. I also discuss phenomena such as referred pain, psychogenic pain, and congenital insensitivity to pain.
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Join Jesse and Chris as we explore the hypothesis that an asteroid ended the Cretaceous AND the age of the reptiles. It's a very compelling scientific story of discovery.
This has been hotly debated back and forth for a long long time, with consensus being reached only recently (since I was in graduate school)
Other options include a massive volcanic outpouring - Deccan Traps in India erupted >1 million cubic km of lava in a million year period, with 50% of that coming before the mass extinction event. The question is really about what killed so much stuff? How does the Earth respond to massive impacts? There have been other large meteorite impacts (and big volcanic eruptions) with no mass extinction - why this one? Was the Earth already in a sorry state (lots of CO2 and mercury in the atmosphere) before the extinction?Flood basalt volcanism is tied to other major mass extinction events (end-Permian and end-Triassic)As we look at the evidence, we bounce around the globe. We begin in Italy.
1- Gubbio, Italy. Layers of ancient limestone that are now folded and uplifted. Working from bottom to top- site became a magnet. Why? It has a thin layer of dark clay. Walter Alverez became v. Interested in this. He studied the foraminifera below and above. He found that at the top of the white limestone, the vast diversity of the forams abruptly went missing.2- Spain - 1500km away. On the Atlantic coast outside of Zumaia. 2 beaches here which are of interest to geologists because they are situated among the longest set of continuous rock strata in the world. Jan Smit was studying the forams here. In these layers, Smit found a strange clay layer - just like Alvarez. In these rocks, they were steady, consistent, for over a million years, then all of the sudden, the clay layer. There is no evidence of anything happening and then all of the sudden, the clay layer and bang, they’re gone.
How long did this take to change?
3- Walter brought in his dad, Louie Alverez. He brought in his knowledge of Astrophysics. He found the layer to be rich in IR (also iron, nickel and cobalt). It contained over 30 X the amount in surrounding rock (measured from the clay at Gubbio). Could it come from an Asteroid. He hypothesized that the IR would be spread all over the world as a blanket. So he could calc. The amount that was laid down all over Earth. Knowing the amount that is in Asteroids and Comets, they can calc. The size of the Asteroid.
5- Texas on the Brazos River. 65 my this was the bottom of a sea. We found, Allen Hildebrand, strange sed deposits across the basin. 7 million years of boring mud there. This was under water. Then suddenly, we see the mud got eroded. Suddenly, there were huge boulders in the mud. Only a giant Tsunami could do this.
6- Haiti: Report of volcanic rocks. They were actually ejecta full of shocked qtr and spherules. They were also full of melted rocks called tektites.
Download the CampGeo app now at this link.
On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!
Like, Subscribe, and leave us a Rating!
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Website: https://planetgeocast.com/ -
Mermaids aren't real. That much we know. But the history and lore of these magical and sometimes menacing creatures of the sea is pretty interesting stuff. Learn all about these half women/half fish in this classic episode.
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Inspired by a listener mail, the guys explore an enduring, disturbing mystery from across the Atlantic: Between 1993 and the late 1990s, multiple women disappeared in an 80-mile area outside Dublin, which came to be known as the "Vanishing Triangle." But what led to these disappearances? Could one or more of them be connected? Tune in to learn more.
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The end of summer 2021 has been earmarked as the time by which most American adults will be vaccinated. But still remaining is the often-overlooked question of vaccinations for children, who make up around a quarter of the U.S. population.
Without the immunization of children, herd immunity cannot be reached.
Today, we ask when America’s children will be vaccinated.
Guest: Apoorva Mandavilli, a science and global health reporter for The New York Times.
For an exclusive look at how the biggest stories on our show come together, subscribe to our newsletter. You can read the latest edition here.
Background reading:
Pfizer and Moderna have begun testing their vaccines on children 12 and older. The vaccine for kids is coming, but not for many months.New research has cast doubt on the idea that prior infections with garden-variety coronaviruses might shield some people, particularly children, from the pandemic.For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.
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Serial killers are insane, prone to exaggeration and delusion, and often inveterate liars. Amid some of their wilder claims, several notable serial killers, such as David Berkowitz and Henry Lee Lucas, have stated that they were killing on the orders of a cult. Is there any way it could be true? Tune in to learn more about the Hand of Death, Four Pi and other alleged serial killer cults.
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Nowadays Edward Bernays remains a relatively obscure historical figure. His legacy, however, is thriving around the globe, and his techniques are found in everything from the food we eat to the things we believe. But who was this man, and how did he get his start? And how does his work affect you today?
Learn more about your ad-choices at https://www.iheartpodcastnetwork.comThey don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/
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On The Waterpeople Podcast, we're delving deep into the intricacies of how the world's most adept waterpeople make lives of great meaning through meaningful play. In this episode Lauren L. Hill and Dave Rastovich elucidate the the 'whys' of making the podcast, reveal about their highlights from Season One, and welcome you to their watery world.
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The Waterpeople Podcast is a gathering for our global ocean community to dive into the critical conversations of our culture through storytelling. We sit with some of the most adept waterpeople on the planet to explore common themes of aquatic lives lived well: ecology, community, activism, science, egalitarianism, inclusivity, meaningful play.Listen with Lauren L. Hill & Dave Rastovich
Sound Engineer: Shannon Sol Carroll
Join the conversation: Waterpeoplepodcast.com
@Waterpeoplepodcast
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Listen with Lauren L. Hill & Dave RastovichSound + Video Engineer: Ben J Alexander
Theme song: Shannon Sol Carroll
Additional music by Kai Mcgilvray + Ben J Alexander
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You'll get water-centric reading and listening recommendations, questions worth asking, and ways to take action for the wellbeing of Planet Ocean delivered straight to your inbox.
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Kenneth Reckhow, Ph.D., formerly director of Water Resources Research Institute of North Carolina and currently professor of water quality at Duke's Nicholas School, will talk about "Water Quality." Wednesday, February 21, 7-9 pm, Eno River Unitarian Universalist Fellowship, Durham, NC. Comments/Questions can be directed to Joseph Puentes; [email protected]; http://H2Opodcast.com; 206-339-4134
