PlanetGeo: The Geology Podcast

Ask a room full of intro geology students whether a snowflake is a mineral and almost every hand says no. Ask why, and someone will tell you it's because no two snowflakes are alike. Chris Bolhuis has been asking that question for 25 years — he asked it of a young Jesse Reimink sitting in his high school classroom — and the answer is the whole point of this lesson.
It's been a while since we've released an episode on the Planet Geo feed, and there's more coming (plus a few projects we can't wait to announce). In the meantime, we're sharing the intro chapter of our Camp Geo audio textbook — the first lesson of the Physical Geology course you'd take in your first semester as a geology major. Several podcast platforms now display chapter artwork, which is close to how the Camp Geo mobile app works, so this is also a bit of an experiment: tell us how it lands.
Chris and Jesse start where geology starts: the five criteria something has to meet to be a mineral. It has to be solid, naturally occurring, inorganic, have a definite chemical composition, and have a definite crystalline structure. The first three are easy (though "inorganic" is on shaky ground as mineralogists warm to biominerals — this rule may not survive the decade). The last two are where students get hung up, so they slow down: quartz is always SiO2, halite is always NaCl, and swap potassium in for sodium and you've got a different mineral entirely.
Then a quick tour of the chemistry you half-remember from high school. Chris blows an atom up to the size of a 30-seat classroom — the nucleus is the tip of a pencil dangling from the ceiling, and everything else in the room is electron cloud. Jesse walks through protons, neutrons, and electrons, and why the loosely held electrons are what drive bonding. Ionic bonds transfer electrons (sodium hands one to chlorine, and a cation and anion snap together); covalent bonds share them. Chris's "paw-sitive" mnemonic and Jesse's parenting advice about covalent bonding are both, by mutual agreement, terrible. They both work.
The episode closes with the analogy that ties it all together: a five-gallon bucket of tennis balls dumped on the floor. There's one best way to stack them. Add a bucket of marbles and the best way to stack changes — a different composition forces a different structure. Because there is a definite chemical composition, there is a definite crystalline structure. Elements make minerals, minerals make rocks, rocks make the planet.
And then Jesse quizzes Chris. Chris goes one for two and files a formal complaint about question number two.
In this episode
Why we're releasing Camp Geo content on the Planet Geo feed (and what's coming)
The five criteria for a mineral — solid, naturally occurring, inorganic, definite chemical composition, definite crystalline structure
Why "inorganic" may get dropped from the definition as biominerals gain acceptance
Quartz vs. halite vs. the potassium version — what "definite composition" really means
Is a snowflake a mineral? Working through all five criteria (yes, and you're a snowflake too)
The classroom-sized atom and the pencil-tip nucleus
Protons, neutrons, electrons — and why electrons do all the bonding work
Ionic bonding: sodium, chlorine, cations, anions, and "paw-sitive"
Covalent bonding: sharing electrons instead of stealing them
The tennis-ball-and-marble analogy for crystal structure
Definite composition → definite structure → minerals → rocks
The quiz: Chris goes 1 for 2 and disputes the scoring
About the series
Camp Geo is Chris and Jesse's audio textbook version of an introductory Physical Geology course, built for the Camp Geo mobile app, where each lesson comes with a stack of images to follow along with. This is Chapter 1. Chris Bolhuis is a nationally recognized earth science teacher in Michigan; Dr. Jesse Reimink is his former student and now a professor in the Department of Geosciences at Penn State.
Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

Like, Subscribe, and leave us a Rating!

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What happens when a finance guy who's never heard of lithium takes a job in a small North Carolina town because it's near where his favorite author lived?Joe Lowry is the founder of Global Lithium LLC, host of the Global Lithium Podcast (239 episodes and counting), and author of the new memoir Lithium Confidential: Confessions of a Corporate Misfit. He spent 35 years in the industry — including years in Japan and China — and for a stretch in the 1990s he personally controlled essentially all of the lithium supply going into the world's first commercial lithium-ion batteries.This is a longer, less traditional episode for us, and it's worth every minute. Joe walks through the entire lithium cycle from rock to cathode, explains why the industry started as a hydrogen bomb program, and gives an unusually blunt read on where the industry is headed — including his line that there's no Smackover lithium without direct lithium extraction, and why he thinks the first real success there lands around 2029.There's also plenty here for students and early-career geologists: Joe's argument that you should learn the industry, not just deploy your geology skills, and his advice on what actually makes a career durable.Some things we get into:Why lithium was in Post-it Notes, blue jeans, and grease long before batteries
The full flow sheet: spodumene → calcine → lithium sulfate → carbonate → hydroxide, and why the "midstream" means cathode, not chemicals
Hard rock vs. Atacama brine vs. sedimentary (Thacker Pass) vs. Smackover oilfield brine
Why grade matters: 600 ppm Smackover vs. sub-100 ppm produced water (sorry, Marcellus)
How the market went from 300,000 tonnes LCE in 2020 to nearly 2 million today
The 2022 spike to $80,000/t and what happened after
Why Joe called BS on the high-nickel/hydroxide narrative and was right about LFP
Sodium-ion: real use cases, or a CATL press release every time lithium ticks up?
What "crappy brine" means, and the fraud problem in African spodumene
Commodity or specialty chemical? Why fungibility is the whole argument
Getting fired as the best thing that ever happened to him
Timestamps
00:00 – Intro
01:30 – Welcome, and the strange experience of being recognized by voice
03:10 – How Joe got into lithium: oil, corporate raiders, a gold mine, and a small town near Asheville
06:00 – Lithium before batteries: glass, grease, and the dye in Post-it Notes
08:30 – Japan, China, and being the only person who thought batteries would matter
12:30 – What the "midstream" actually is, and why battery plants without cathode plants don't solve anything
13:30 – The hydrogen bomb origin story: DOE, Lithium Corp of America, Foote Mineral
14:20 – Hard rock processing, start to finish
15:45 – Enter brine: Silver Peak, then the Atacama
17:20 – Sodium sulfate, the glass industry, and putting the blue in blue jeans
18:50 – SQM arrives and the price goes from $2/lb to 68 cents
21:20 – Greenbushes: a tantalum mine that happened to have lithium
23:00 – China's assets, lepidolite, and how CATL became a third of the market
25:20 – 300,000 tonnes to 2 million: "what's grown that fast that's not software?"
26:40 – Thacker Pass: wrong flow sheet, right rock, and a $2.3B DOE loan
29:40 – "Soft rock," the McDermitt caldera, and Tom Benson
30:20 – The Smackover, bromine wells, and why you can't build ponds in Arkansas
31:30 – DLE: what counts, what's actually working, and what's still a declared victory
33:15 – What makes a brine "crappy"
33:40 – Grades, produced water, and why Pennsylvania shouldn't get too excited
34:20 – Arkansas is all-in; Exxon is slow-walking it
37:50 – Garbage spodumene, African supply, and lithium that showed up in China with no lithium in it
38:50 – The four-minute mile: why 2029 is the year to watch
40:40 – Recycling and the circular economy reality check
42:50 – Is it still the lithium decade?
43:20 – China controls processing — and depends on everyone else for supply
44:40 – LFP vs. NMC/NCA, and the call Joe got right
46:30 – What's actually in your iPhone
48:00 – Sodium-ion: niches, not a replacement
50:00 – BESS, aging grids, and a prediction Joe made in 2010
51:55 – Advice for students and young geologists entering lithium
53:40 – On AI, and bulletproofing what you do
54:00 – Starting the Global Lithium Podcast: Tim Ferriss, a LinkedIn post, and a studio in Buenos Aires
55:20 – Downloaded in every country on Earth except Bhutan
57:10 – The Korean listeners who finally explained themselves
1:00:10 – The real value of a podcast is what's said before and after the record button
1:02:30 – Australia 34%, US 30%, and why resource economies listen
1:05:10 – Which lithium conference should a student actually go to?
1:09:00 – Writing Lithium Confidential: five life goals from January 1, 1982, and a granddaughter
1:11:30 – Why the book has exactly 100 chapters
1:16:20 – Commodity or specialty chemical? The fungibility argument
1:18:20 – Specs, secret sauce, and selling the same product twice
1:20:00 – The freedom that comes with getting fired
1:20:25 – Joe's best day in the lithium business
1:23:30 – Best deposits he's ever visited: Pilgangoora's vision, Liontown's build
Links
Lithium Confidential: Confessions of a Corporate Misfit — available in print and Kindle
globallithium.net
The Global Lithium Podcast — wherever you get podcasts
Joe on LinkedIn: Joe Lowry | On X/Twitter: @GlobalLithium (note the handle — not the Australian company)
CampGeo mobile app — pegmatites, mineral basics, and all our back catalog
planetgeocast.com | @planetgeocast
Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

Like, Subscribe, and leave us a Rating!

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Instagram: @planetgeocast
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Email: planetgeocast@gmail.com
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There's a photo on Tim Ireland's Google Scholar profile of a toddler standing on the floor of an open pit gold mine in Australia's Northern Territory, wearing a hard hat and — because it was the early 1980s — flip flops. That toddler is now the Principal Geologist for Exploration at **First Quantum Minerals**, one of the world's major copper producers, and in this episode Jesse sits down with him to talk about how mineral exploration actually works.

Tim grew up with two geologist fathers, but the path in wasn't as direct as it sounds. He took a gap year as a field technician and mostly hated it. He considered leaving to design jewelry. He turned down a PhD because being told he'd become "one of the world experts on sedimentary rock–hosted zinc" sounded uncomfortably narrow — then spent a few years alone in the desert with a drill rig and 22,000 square kilometers of ground before the university called back with something better.

From there we get into the machinery of exploration. Tim describes the job as **reducing search space** — starting with a continent and narrowing until you're willing to spend real money drilling — and why that philosophy holds whether you're chasing porphyry copper in Chile, sediment-hosted copper in the DRC, or orthomagmatic nickel in Finland. We also get into the part they don't teach in a mineral deposits course: three or four people weighing in over email on whether to spend millions on relatively scant information, and why what a company really pays a principal geologist for is a **calibrated gut**.

The scientific heart of the episode is what Tim calls the **quality question**. Deposit models are good at telling a geologist whether they're getting warmer. They're not good at telling you whether the thing you're walking toward will ever be a mine — and the industry is full of "technical successes" nobody publishes, where the geologist did the job right and the deposit simply wasn't good enough. We also cover critical minerals and why the West is late (Tim was in the room in Oslo in 2007 when China announced the plan out loud), the 22-year lag from discovery to production, and why he's skeptical of AI prospectivity tools — if there are only ten porphyry deposits on Earth with more than a hundred million tons of contained copper, that's not a training set.

It closes with Tim's best day as a geologist: alone in a gorge in the northern Chilean desert, a ten-mile traverse, a spire of rock he probably shouldn't have climbed, and one outcrop that put his hand on a fault he'd only been able to argue about on paper.

In this episode

- The Google Scholar baby photo — hard hat, flip flops, floor of an open pit
- A gap year he didn't enjoy, and the jewelry business that never happened
- Why he turned down a PhD on sedimentary zinc — and what he asked for instead
- Industry-funded research: "cut-price consultants," or the best training pipeline there is?
- Reducing search space: the one philosophy that holds across every deposit type
- Spending millions on scant information, and what a calibrated gut is worth
- Critical minerals, the 2007 Oslo warning, and who's still in denial
- 22 years from discovery to production — and why averages lie
- The quality question: why our models can't tell a mine from a "technical success"
- AI in exploration: the useful camp, the black-box camp, and why ten deposits isn't a training set
- Big company vs. junior — kudos versus shares, and the trade-off nobody spells out
- Tim's best day as a geologist, alone in a Chilean gorge

About the guest

Dr. Tim Ireland is Principal Geologist for Exploration at First Quantum Minerals, a global copper-focused mining company. He trained at the University of Tasmania, with an honors project on the MacArthur River zinc deposit and a PhD on porphyry copper systems in northern Chile. His career has run through Newmont in Turkey, a junior working sediment-hosted copper in the DRC, and thirteen years at First Quantum.

Memorable quotes

- "If it were mathematical and there was a definite yes/no answer, we wouldn't be needed."
- "You still have to do the work. You can't just sit at your desk and think about the model."
- "If you've only got ten porphyry deposits in the world with more than a hundred million tons of contained copper, ten's not a great enough training set."
- "I'm still kind of hanging out for that day that I walk up a hill and crack the first rock."

Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

Like, Subscribe, and leave us a Rating!

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Instagram: @planetgeocast
Twitter: @planetgeocast
Facebook: @planetgeocast
Support us: https://planetgeocast.com/support-us
Email: planetgeocast@gmail.com
Website: https://planetgeocast.com/

What if you could tell whether a rock exists on a planet 50 light-years away — without ever leaving Earth? This week Chris and Jesse welcome back friend-of-the-show Dr. Jackie Faherty (American Museum of Natural History) for her fourth appearance to talk about one of the wildest results in exoplanet science yet.
The crew digs into a new Nature Astronomy paper on a rocky planet about 30% larger than Earth, orbiting a tiny star, whipping around fast with a scorching ~1,000 Kelvin surface and — surprisingly — no atmosphere. With no gas in the way, the James Webb Space Telescope was able to read the light coming off the planet itself and start distinguishing what the surface might be made of, right down to the debate geologists love: mafic vs. ultramafic, basalt vs. granite.
Along the way, Jackie explains what makes JWST so special, why it sees in infrared, and how astronomers actually assign those famous colors to the images (spoiler: it's not random). They get into brown dwarfs and why she thinks one may be hiding in our own galactic neighborhood, the coming firehose of data from Rubin and NASA's Roman telescope, and why Jesse has to eat his old postdoc-era complaints that Webb was a waste of money.
It's a mind-bending conversation about living in what feels like a science-fiction era — where a planet's light tells us its secrets.
Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

Like, Subscribe, and leave us a Rating!

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Instagram: @planetgeocast
Twitter: @planetgeocast
Facebook: @planetgeocast
Support us: https://planetgeocast.com/support-us
Email: planetgeocast@gmail.com
Website: https://planetgeocast.com/

Granite is everywhere — it makes up much of the continental crust beneath our feet; yet, for over a century geologists were stuck on a deceptively simple question: where does all that magma find room? In this episode, Jesse and Dr. Mike Ackerson pick the granite series back up to tackle the "room problem" — the puzzle of how you wedge a magma body tens of kilometers wide into solid crust. Using California's Tuolumne Intrusive Suite (the fruit fly of igneous petrology) and the landmark Coleman et al. 2004 paper, they show that the way out isn't space at all — it's time. These giant plutons weren't emplaced in one molten flash; they were assembled incrementally over millions of years. Along the way: a whirlwind history of geochronology, why the word "lead" makes clean-lab chemists recoil in horror, and the slow death of the "magma chamber."
Download the CampGeo app now at this link.

On the app you can get tons of free content, exclusive images, and access to our Geology of National Parks series.
You can also learn the basics of geology at the college level in our FREE CampGeo content series - get learning now!

Like, Subscribe, and leave us a Rating!

——————————————————
Instagram: @planetgeocast
Twitter: @planetgeocast
Facebook: @planetgeocast
Support us: https://planetgeocast.com/support-us
Email: planetgeocast@gmail.com
Website: https://planetgeocast.com/