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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, earthquakes, volcanoes, glaciers and so much more. It does not matter if you have no experience in geology, Gary will help you to understand the fundamentals of our planet so you can have a greater understanding about when you see when visiting your backyard, your local creek, cliff or beyond. You can also join Gary as he runs Field Adventures (specialist travel experiences) to see parts of the world through the eyes of a passionate Earth scientist. Find out more at www.geoetc.com.

Podcast episodes

Check latest episodes from GEO Podcast podcast

Current Iceland Volcanic Activity 101

2024/01/19

In this episode, I explain in simple terms what is happening in Iceland these last few years on the plate boundary. I explain the two geological phenomena in Iceland, the recent eruptions and earthquake activity, and how they are related to Plate Tectonics. Support the show

Fake & Pseudo Fossils

2023/12/22

In this episode, I talk about fake fossils and why people create them, as well as pseudo fossils such as dendrites. Visit our GEOetc Members Section - Over 100 teaching resources that are classroom-ready to help you teach Earth science. Come and check out all we have to offer at GEOetc.com Support the show

Where does magma come from?

2023/12/16

In this episode, I talk about how molten rock is formed inside the Earth - what are the mechanisms that cause our planet to produce molten rock to feed volcanoes? 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 Support the show

All about limestone

2023/06/30

In this episode, I talk about the different forms of limestone and how they form including chalk, coquina, fossiliferous limestone, travertine, and oolitic limestone. 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

Bowens Reaction Series

2023/06/23

In this episode I talk about Bowen's Reaction Series - and how it tells us the order of crystallization of minerals from molten rock. Support the show

Earth's Major Systems

2023/06/16

The Earth is a huge system made up of a number of 'spheres' - the geosphere, hydrosphere, cryosphere, atmosphere, and biosphere. What are each of these spheres and how can they interact? This episode explains each sphere and gives examples of the interaction between them. 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

Buying a rock (geologic) hammer

2023/06/09

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

Earth's largest volcano erupts - Mauna Loa 2022

2023/06/02

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

Have I found gold? Simple tests to find out!

2023/05/26

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

Hawaii - why I love taking people to visit the volcanoes

2023/05/19

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

The 5 Great Extinctions

2023/05/12

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

Graptolites

2023/05/05

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