Don't Panic Geocast

It's not an exact science.

About the show

John Leeman and Shannon Dulin discuss geoscience and technology weekly for your enjoyment! Features include guests, fun paper Friday selections, product reviews, and banter about recent developments. Shannon is a field geologist who tolerates technology and John is a self-proclaimed nerd that tolerates geologists.


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    Episode 364 - Geology of War "I'm glad I listen to this podcast"

    May 12th, 2023  |  55 mins 43 secs

    Join us as we explore how the intricate interplay between geology and military strategy has shaped history. We unravel the secrets behind the terrain's influence on battles, from its impact on troop movements to the potential for fortifications and natural defenses. Additionally, we investigate an intriguing question: What type of rock is the deadliest? We are astonished by the unexpected ways in which geology has played a pivotal role in shaping the destiny of nations in times of war.

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    Episode 363 - "National Natural Landmark"

    May 5th, 2023  |  52 mins 37 secs

    In this episode of the Don't Panic Geocast podcast, we continue our exploration of the Ice Age National Scenic Trail, immersing ourselves in its stunning landscapes and geological wonders. From glacial features to ancient river valleys, each step along the trail reveals new marvels waiting to be discovered. In the "Fun Paper Friday" segment, we dive into the intriguing world of gas marbles, unraveling their peculiar properties and potential applications.

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    Episode 362 - "A lot of gray area in geology"

    April 28th, 2023  |  46 mins 42 secs

    This week we dive into dolomite and see what makes it tear up pants, boots, and more!

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    Episode 361 - "No Ice Other than in Tea" Ice Age Trail Part 1

    April 14th, 2023  |  1 hr 1 min

    John and Shannon are embarrassed to learn about a "new" national park - the Ice Age National Scenic Trail!

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    Episode 360 - "Third and Fourth Order Nonsense" Lane's Balance

    April 7th, 2023  |  43 mins 14 secs

    This week we dive into rivers and what makes them erode, deposit, move and more using an engineering concept called Lane's balance.

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    Episode 359 - "Standing Around Staring"

    March 17th, 2023  |  37 mins 24 secs

    We've missed you - but we have a good reason! John has been moving! Again!

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    Episode 358 - "Put a pin in it" Surveillance Balloons

    February 24th, 2023  |  57 mins 11 secs

    There's been a lot of buzz about the PRC surveillance balloon, so we unpack the history of using balloons for science and for military.

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    Episode 357 - "Looks like the iron throne"

    February 10th, 2023  |  42 mins 44 secs

    Giant crystal in caves sounds more like a plot twist than a geological phenomena, but this week we learn how the Naica Mine crystals were formed! Also can you 3D print rocks?

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    Episode 356 - "They'll find me laying in a graben"

    February 3rd, 2023  |  38 mins 33 secs

    This week we talk about basin and range topography, horsts, grabens, and more! Also how similar is your mouth bacteria to someone you kissed?

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    Episode 355 - "Best First Week of Class Ever"

    January 27th, 2023  |  52 mins 54 secs

    This week John and Shannon discuss some mysterious rocks whose extraterrestrial origin is still debated and if growing a beard is a good defense against a punch.

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    Episode 354 - "That's Gneiss"

    January 20th, 2023  |  33 mins 13 secs

    This week John is on travel so we talk about the geology of New York City and how it shaped the city so many love.

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    Episode 353 - "We Didn't Do So Well"

    January 13th, 2023  |  1 hr 13 mins

    We look back at 2022 and forward to 2023 in the class resolutions/recap show.

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    Episode 352 - "Why are things so heavy in the future?"

    December 23rd, 2022  |  51 mins 1 sec

    Shannon went to a workshop on determining the provenance of sediments using heavy elements, optical microscopes, and Raman spectra! Also, does your dog lie when they urine mark? Studies say yes!

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    Episode 351 - "Our Favorite Things"

    December 16th, 2022  |  1 hr 12 mins

    2022 flew past, so this week John and Shannon review their favorite things, experiences, classes, and more of 2022. Everything from bee keeping to kitchen appliances to multimeters to books!

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    Episode 350 - "Borehole to Hell"

    December 2nd, 2022  |  47 mins 41 secs

    How deep have we actually drilled into the Earth? Turns out, not very far, just 12,262 metres (40,230 ft) or about 0.3% of the way to the center of the Earth. We talk about the challenges of this feat and about potty training cows.

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    Episode 349 - "That Sounds Heavy" Tech Replacement

    November 18th, 2022  |  56 mins 48 secs

    Letting go is hard. This week we talk about when to let go of old tech and when to hold on. We wrap up with a fun paper about the spherical cow and pitting the engineers against the physics crowd.