Tough Soil - The Geology of Hardpan

PlanetGeo: The Geology Podcast

Hardpan! Where did this idea for an episode come from? Chris has been doing a ton of yard work lately and it’s not uncommon come across a layer when digging a hole that is next to impossible to penetrate. He has to bust out my pick axe to get through it. It's Called Hardpan.

• Really dense layer that often occurs below the topsoil.
• Problems:
  • Roots can’t penetrate into the hardpan (Hayden Valley in YNP). Trees are easily blown over if they can even grow here.
  • Water can’t penetrate so the soil layer above is easily saturated.
  • Safe to say that farmers and gardeners generally don’t like it.
  • Can even cause drainfield failure - creates an impervious layer
  • These are just a couple of problems - there are more.
• In this episode, Chris and Jesse do a deep dive into the geology of hardpan. We hope you enjoy.

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