GEO Podcast
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.
Episodes
79 episodes
Microfossils
You can find the GEO podcast on iTunes right here.You can also find GEO Podcast or all the major podcast capture platforms!(Go on...subscribe and ...
Shale - and how we use it
You can also find GEO Podcast or all the major podcast capture platforms!(Go on...subscribe and do not miss the new episodes)In this episode, I talk about shale, some major types, and how humans have used shale over time.
Sandstone - quartz, arkose and lithic
You can find the GEO podcast on iTunes right here.You can also find GEO Podcast or all the major podcast capture platforms!(Go on...subscribe and ...
Apparent Polar Wandering & Plate Tectonics
You can also find GEO Podcast or all the major podcast capture platforms!(Go on...subscribe and do not miss the new episodes)In this episode, I explain what apparent polar wandering curves are and how the information was th...
Seeing Inside the Earth
In this episode, I explain how seismic waves are used to see the internal structure of the Earth including the crust, mantle, outer core, and inner core.You can also find GEO Podcast or all the major podcast capture platforms!
Tectonic Plates - Lithosphere, Moho, Asthenosphere
In this episode, I talk about the structure of a tectonic plate and introduce the terms crust, mantle, lithosphere, moho discontinuity, and asthenosphere.You c...
Three reasons why civilizations grew up around volcanoes
In this episode, I talk about the three reasons why people and civilizations grew up around active volcanoes. Why did people need to live close to the dangers of eruptions? What was it that drove and kept them there?Vi...
Salt Weathering
In this episode, I talk about how salt acts as a physical weathering agent to break down rocks. Physical weathering is the breaking down of rocks without a chemical change, and salt can act as the agent that breaks down rocks especially c...
Current Iceland Volcanic Activity 101
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 ...
Fake & Pseudo Fossils
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 ar...
Where does magma come from?
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 Se...
All about limestone
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
Bowens Reaction Series
In this episode I talk about Bowen's Reaction Series - and how it tells us the order of crystallization of minerals from molten rock.
Earth's Major Systems
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 e...
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
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...
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...
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 a...
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
Graptolites
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 perfe...
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 o...
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.
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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 o...
