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.

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In this episode, I talk about the structure of a tectonic plate and introduce the terms crust, mantle, lithosphere, moho discontinuity, and asthenosphere.


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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?

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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 close to the ocean, but also in salt-rich soils, etc.

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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.

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In this episode, I talk about fake fossils and why people create them, as well as pseudo fossils such as dendrites.

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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?

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

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

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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.

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