Don't Panic Geocast

Episode 348 - "Hot Juicy Magma"

Listen Later
  • Forms in fractures of rocks already in place, so it an INTRUSIVE feature
  • Form at right angles to the direction of extension in the area - nature’s frac jobs
  • Can be super thin or super thick, but generally are self-consistent
  • Can have multiple periods of injection or even multiple compositions of injection over time
  • Can get en echelon patterns, rings, and cones (last two common with caldera volcanism)
  • Magmatic are the most well known and form when magma flows into a crack and cools into a sheet.
  • The igneous rock is generally more weathering resistant so we get cool weathering features
  • Can be rhyolitic, but mostly basaltic
  • Rate of cooling determines grainsize (slow = big) and big near the center
  • Can have columnar jointing
  • Big phenocrysts orient with flow direction - cool! AMS studies show this.
  • These are awesome when you get them radially around a volcano!
  • Horizontal dikes are called sills
  • Clastic dikes are formed by sediments episode 177
  • Can be formed with fluid pressure
  • Cracks in permafrost that fill in
    • Fun Paper Friday
    • One plus one equals two, right? Sure, but you won't get published saying it that way.
    • Siegfried, John J. "A first lesson in econometrics." Journal of Political Economy 78.6 (1970): 1378-1379.
      • Contact us:

      Show

      • Support us on Patreon!
      • www.dontpanicgeocast.com
      • SWUNG Slack
      • @dontpanicgeo
      • [email protected]

        • John Leeman

        • www.johnrleeman.com
        • @geo_leeman

          • Shannon Dulin

          • @ShannonDulin
            • ...more
            View all episodesView all episodes
            Download on the App Store
            Don't Panic GeocastBy John Leeman and Shannon Dulin
            • 4.9
            • 4.9
            • 4.9
            • 4.9
            • 4.9

            4.9

            45 ratings

            More shows like Don't Panic Geocast

            View all
            Radiolab by WNYC Studios

            Radiolab

            43,931 Listeners

            Freakonomics Radio by Freakonomics Radio + Stitcher

            Freakonomics Radio

            32,081 Listeners

            Wait Wait... Don't Tell Me! by NPR

            Wait Wait... Don't Tell Me!

            38,777 Listeners

            StarTalk Radio by Neil deGrasse Tyson

            StarTalk Radio

            14,306 Listeners

            Nature Podcast by Springer Nature Limited

            Nature Podcast

            762 Listeners

            Planetary Radio: Space Exploration, Astronomy and Science by The Planetary Society

            Planetary Radio: Space Exploration, Astronomy and Science

            1,353 Listeners

            The Amp Hour Electronics Podcast by The Amp Hour (Chris Gammell and David L Jones)

            The Amp Hour Electronics Podcast

            232 Listeners

            Universe Today Podcast by Fraser Cain

            Universe Today Podcast

            565 Listeners

            Embedded by Logical Elegance

            Embedded

            191 Listeners

            Science Magazine Podcast by Science Magazine

            Science Magazine Podcast

            819 Listeners

            Science Friday by Science Friday and WNYC Studios

            Science Friday

            6,380 Listeners

            Ologies with Alie Ward by Alie Ward

            Ologies with Alie Ward

            24,342 Listeners

            Daniel and Kelly’s Extraordinary Universe by iHeartPodcasts

            Daniel and Kelly’s Extraordinary Universe

            2,345 Listeners

            The Supermassive Podcast by The Royal Astronomical Society

            The Supermassive Podcast

            319 Listeners

            PlanetGeo: The Geology Podcast by Chris and Jesse

            PlanetGeo: The Geology Podcast

            245 Listeners