A place to learn about geology for teachers, students, rock hounds, and geology enthusiasts. 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 find the GEO podcast on iTunes right here.

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Three reasons civilizations grew up around volcanoes
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Salt Weathering
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Current Iceland Volcanic Activity 101
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Fake and Pseudo Fossils
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Where does magma come from?
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All about limestone
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Bowens Reaction Series
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Earth's Major Systems
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Buying a rock (geologic) hammer
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Earth's largest volcano erupts - Mauna Loa 2022
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Have I found gold?  Simple tests to find out!
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Hawaii - why I love taking people to the volcanoes!
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The 5 Great Extinctions
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Graptolites
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Elements needed for an EV battery
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Volcanic Explosive Index
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Volcanic Eruption Styles
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Sapphires, Rubies and Corundum (oh my!)
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Longshore Drift - the shifting sands
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Volcanoes & Climate
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Focus & Epicenter - important earthquake terms
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Ring of Fire - whats happening around the Pacific?
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Diamonds - all about those gems!
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Index Fossils - the keys to dating layers
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Landslides - the 'other' natural disaster!
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Radioactive Dating - how we use it to age rocks.
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What is the history of the theory of Plate Tectonics?
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What are the mechanisms that drive Plate Tectonics?
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Sand - why do we see such variations?
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Missing time - what are unconformities?
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Seeing inside the Earth
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Trilobites - King of the fossils
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Earth's layers explained
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What is a glacier?
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Why are dikes AWESOME?
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Why is Iceland an island?
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Why are some volcanic eruptions, like Tonga and Krakatoa, so explosive?
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Why is Hawaii such a great learning laboratory
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Volcanic eruptions - how we monitor what a volcano is doing
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Rivers - simple morphology and classification
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Banded Iron Formations and what they tell us about the Earth's evolution
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Earth's natural (geological) resources - what are they?
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Lithosphere, Asthenosphere and Moho- what's that all about?
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Continental Crust - whats it all about?
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Oceanic Crust - whats it all about?
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Metamorphic rocks for beginners
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Life as a Geologist - Dr Chris Spencer
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Four ways to get field experience - for college/university students
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Evidence for past climate change
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Volcano shapes - shield, composite/stratiform, caldera - and chemistry
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Transform fault plate boundaries - what are their features?
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Convergent plate boundaries - subduction, collision and Island arcs - what are their features?
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Divergent plate boundaries - what are their features?
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) In this episode, I talk about the geological and topographic features of ...
The Evidence for Plate Tectonics
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) Transcript of this episode In less than 12 minutes, I summarize the ...
Tsunami - the science behind the waves
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) In this episode, I talk about the science of Tsunamis - those ...
Limestone Caves - how do they form (the chemistry of solution caves)
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) In this episode, I talk about solution  (Limestone/marble) caves and how they ...
Earth's Magnetic Reversals, Polar Wandering and Plate Tectonics
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) In this episode, we chat about the Earth's magnetic field and how ...
Mineral Occurrence through to Ore Deposit.  What do these terms mean?
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) In this episode, I talk about the differences between a mineral occurrence, ...
Oil - how oil is formed and trapped
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Relative Dating - working out what happened first, second...
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) How does a geologist work out the sequence of events when looking ...
Erosion - moving stuff around
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) Erosion is the moving of broken-down rock materials from one place to ...
Weathering - breaking down in place
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) Often the most misunderstood part of the tri-process weathering-erosion-deposition cycle, weathering is ...
Starting off collecting - a beginners guide
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) Today we talk about places you can go to start collecting rocks ...
The Science of Gold
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Earthquakes - what you need to know!
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) What are earthquakes? How are they formed? What is causing the shaking? ...
Silicate minerals - for non scientists
You can find this podcast on iTunes right here. The silicate minerals are the building blocks for all the rocks on Earth.    They follow a system of formation and ...
Geoscience jobs - just some of the types of geologist!
You can find this podcast on iTunes right here. There are just so many different roles and specialties in the field of geology.  Many of these jobs have different titles ...
All about granite
You can find this podcast on iTunes right here. In this episode, I talk about the rock type granite - why I love it, how it forms and what minerals ...
Simple rock classification - igneous, sedimentary and metamorphic rocks
You can find this podcast on iTunes right here. In this episode, I outline the simple classification of rocks into the groups igneous, sedimentary and metamorphic rocks. And finally - ...
Introduction to Plate Tectonics
You can find the GEO podcast on iTunes right here. (Go on...subscribe and not miss the new episodes) Learn the basics of the theory of Plate Tectonics in less than ...
Mineral Color and Streak
In this episode, I talk about mineral color and streak as ways to identify minerals in your collection.  The big take away from this, is that color alone is not ...
Mineral Hardness
In this episode, I talk about mineral hardness and how you can use common materials around your home to create your own mineral hardness kit.  I explain how the Mohs ...
Why geology?... and how I got into geology
In this episode, I talk about how I became interested in geology and about the four reasons I think geology is important.  These are:
  1. Understanding the past will help ...