Episode notes
In this episode, I talk about the extinct colonial animal we call graptolites. These are fascinating fossils as they not only show an evolutionary trend that goes from complex to simple, but their wold-wide distribution makes them a perfect index fossil. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
Podcast
GEO Podcast
Gary Lewis, GEOetc.com · Tech & Science · English
A place to learn about geology for teachers, students, rock hounds, and geology enthusiasts - that comes out on Fridays! Gary Lewis is an Australian-born geologist who loves to share his passion for all things 'geology'. In the GEO podcast, Gary takes you on a journey to learn about rocks, minerals
More from GEO Podcast All episodes →
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S4 · E65 · 9 Jun 2023 · 6 min
Buying a rock (geologic) hammer
In this episode, I talk about the things to consider when buying a geologic hammer - what to look for and the decisions you will need to make. You can find this information and more in my blog post about buying a forever hammer. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E64 · 2 Jun 2023 · 7 min
Earth's largest volcano erupts - Mauna Loa 2022
In this episode, I talk about the recent eruption of Mauna Loa on the Big Island of Hawaii. The eruption was in 2022 and lasted just two weeks - but produced massive around of lava. Come and join us in Hawaii, or on any of our field adventures. See here for the trips for educators and here for the trips for geocachers. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E63 · 26 May 2023 · 6 min
Have I found gold? Simple tests to find out!
In this episode, I talk about the three common minerals that fool people into thinking they have found gold - pyrite, chalcopyrite, and mica. I talk about the simple tests you can do to find out if what you found was really gold or one of these three. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E62 · 19 May 2023 · 9 min
Hawaii - why I love taking people to visit the volcanoes
In this episode, I talk about the four reasons I just love to take people on tours around the volcanoes in Hawaii. It is about the accessibility of seeing the planet's largest and most active volcanoes and more. Come join us on an field adventure: www.geoetc.com/field-adventures Support the show
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S4 · E61 · 12 May 2023 · 8 min
The 5 Great Extinctions
In this episode, I talk about the five great extinction events - events in which more than 70% of species on Earth become extinct. When did these occur and what might have caused each event. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E59 · 28 Apr 2023 · 8 min
Elements needed for an EV battery
In this episode, I talk about the major elements needed for an EV battery (lithium, cobalt, nickel, manganese and graphite). How much is needed for just one EV battery? Where are these materials currently coming from? Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E58 · 21 Apr 2023 · 8 min
Volcanic Explosive Index
In this episode, I talk about the Volcanic Explosive Index (VEI) and how that logarithmic scale is used to rate eruptions. It is based on the amount of material ejected, the size of the eruption plume and the length of the eruption. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E57 · 14 Apr 2023 · 9 min
Volcanic Eruption Styles
In this episode, I talk about the five major eruption styles - Icelandic, Hawaiian, Strombolian, Vulcanian, and Plinian. What are the characteristics of these different styles of eruptions and what materials do they produce? Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E56 · 7 Apr 2023 · 5 min
Sapphires, Rubies & Corundum (oh my!)
In this episode, I talk about the corundum family of minerals - their chemistry, how they form, and what makes them different from each other. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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S4 · E55 · 24 Mar 2023 · 7 min
Longshore Drift - the shifting sands
In this episode, I talk about how sand moves along a beach due to longshore drift. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Check them out! Support the show
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