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 371 - "Have you tried licking it?"

    September 15th, 2023  |  39 mins 51 secs

    This week we talk about mudrock - which sounds pretty self explanatory, but of course geologists have made a complex classification scheme around it. Also we delve into if you should "sleep on it" when making big decisions.

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    Episode 370 - "Siliceous Ooze"

    September 8th, 2023  |  48 mins 35 secs

    We said if you just pick up a rock, it is probably chert. How does this pervasive rock form? I mean we should have a good idea, right?

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    Episode 369 - "Collect data in the field, do science at home"

    August 25th, 2023  |  54 mins 3 secs

    It takes a lot to plan field work, no matter if it is a day rock hounding or a week in the deep field. This week we talk about what you need to know!

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    Episode 368 - "It is Chert"

    August 18th, 2023  |  52 mins 56 secs

    You walk outside and find a rock - what is it? Well, that's probably a difficult answer. Also, how round are electrons and how do you even measure that?

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    Episode 367 - "Summer Break"

    August 4th, 2023  |  54 mins 29 secs

    This summer was anything but a break - in fact Shannon and John were travelling most of the time! But it is time for back to school so we'll gather up what you need to bring to class.

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    Episode 366 - "I Didn't Blow Away"

    June 23rd, 2023  |  52 mins 5 secs

    This summer while Shannon has been at field camp we took a short hiatus, but we're back! Find out what happened with camp and more as well as what happens when you drop a spinning bottle of water.

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    Episode 365 - Salinity Crisis "Smoking Various Meats and WWII"

    June 9th, 2023  |  39 mins 15 secs

    This week we talk about the Messinian Salinity Crisis and if your mom was right about cracking your knuckles.

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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?