Week 9 - Gemstones

Week 10 - Coal

I discuss coal, it's energy content, how it's mined, where it's mined, and some impacts on the environment and society. Slidedeck PDF File [https://web.pdx.edu/~bershaw/audio/pdf/Lecture_13_Coal.pdf]

Week 9 - Gemstones

I talk a lot about diamonds, both as placer and in kimberlites, but also touch on a couple other gemstones. Slidedeck PDF File [https://web.pdx.edu/~bershaw/audio/pdf/Lecture_12_Gemstones.pdf]

Week 8 - Mercury

We follow up on our discussion of Gold to talk about Mercury, which is used to isolate gold ore, among other things. Slidedeck PDF File [https://web.pdx.edu/~bershaw/audio/pdf/Lecture_11_Mercury.pdf]

Week 7 - Gold

I talk about Gold, a very interesting precious metal, its geologic occurrence, how it's processed, and some economic considerations. Slidedeck PDF File [https://web.pdx.edu/~bershaw/audio/pdf/Lecture_10_Gold.pdf]

Week 6 - Aggregate

Here, I build off our discussion of sand to discuss some applications of "aggregate", why it's mined in and near urban centers, and its broad use in drilling wells. Slidedeck PDF File [https://web.pdx.edu/~bershaw/audio/pdf/Lecture_9_AggregateSand.pdf]