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 332 - "Caliche"

    June 3rd, 2022  |  26 mins 52 secs

    We kick off summer shorts by talking about caliche and ways it makes new field geologists crazy!

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    May 20th, 2022  |  1 hr 33 mins

    This week Dr. Ryan May joins us to talk about life as a scientific software developer and his career path from radars to radiosondes and more!

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    Episode 330 - "Blamo"

    May 13th, 2022  |  1 hr 5 mins

    Last week we talked about material hardness, but what about when materials crack and fracture? This week we talk about fracture toughness.

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    Episode 329 - "Granite Annulus"

    May 6th, 2022  |  1 hr 3 mins

    What makes a material hard? What makes it tough? Are they the same thing?

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    Episode 328 - "Bouma"

    April 22nd, 2022  |  56 mins 23 secs

    This week we talk about the famous Bouma sequence in more detail and look at where the world of quantum physics could have been in a parallel universe.

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    Episode 327 - "Delta Tesseract"

    April 15th, 2022  |  50 mins 20 secs

    What happens when rivers meet oceans? All kinds of fun sedimentary processes that build deltas. Learn more this week along with a discussion of one man's favorite boulders.

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    Episode 326 - "The Pinky Raise"

    April 8th, 2022  |  46 mins 12 secs

    We talk about conglomerates, how they form, how we classify them, and more. Then we talk about distribution of hook worms in poop.

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    Episode 325 - "It turns to mud"

    April 1st, 2022  |  55 mins 40 secs

    This week we talk about the Colorado River and what Shannon was doing back out in the field last week.

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    Episode 324 - "Nanoknots"

    March 25th, 2022  |  43 mins 16 secs

    Hot spots are a hot topic and nowhere more so than Hawaii. We weigh in this week.

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    Episode 323 - "Bug light for nerds"

    March 18th, 2022  |  48 mins 33 secs
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    Episode 322 - "TeX Makes it Beautiful"

    March 11th, 2022  |  59 mins 34 secs

    What the heck is TeX? It's a way to make beautiful documents, equations, and more. This week to talk about its origins and how to get started. We also talk daggers' - ancient daggers to be precise.

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    Episode 321 - "Big Peas"

    March 4th, 2022  |  45 mins 55 secs

    It's been an odd mix on winter weather lately and we dive into what causes different types of wintery precipitation and if the solution to hitting deer is to introduce wolves.

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    Episode 320 - "Hunga Tonga"

    February 18th, 2022  |  43 mins 23 secs

    More than a fun thing to say, Hunga Tonga was a huge volcanic event to launch into 2022 with, we unpack what happened in this massive blast that send shock waves around the world!

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    Episode 319 - "Ions in Solution"

    February 11th, 2022  |  45 mins 32 secs

    We finish up talking about weathering with chemical weathering methods and we look at dog name origins and their relation to baby names.

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    Episode 318 - "Sandstones are Forever"

    February 4th, 2022  |  51 mins 52 secs

    This week we wedge into the topic of mechanical weathering and penguin poo feedback cycles.

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    Episode 317 - "Is your tinfoil hat the same as mine?"

    January 28th, 2022  |  58 mins 33 secs

    This week we talk about earthquake precursors and how real they could be. Then we delve into fashion and figure out when John can wear bell bottom jeans again.