Episode #047: Drumlins - Flow-form Forensics

Summary

In this episode, drumlin expert Jerome Lesemann discusses the formation and significance of drumlins, mysterious landforms created by past glacial activity. Despite advancements in hydraulic modeling, the genesis of drumlins remains a heavily debated topic among scientists. The conversation also explores the connections to the Younger Dryas Impact Hypothesis, potentially shedding light on these enigmatic geomorphological features.

Key takeaways

• 1Jerome Lesemann: Drumlin expert and student of John Shaw, proponent of the Meltwater Hypothesis.
• 2Drumlins are large, streamlined hills formed beneath continental ice sheets, prevalent across North America.
• 3The Meltwater Hypothesis suggests that large volumes of water from melting glaciers are responsible for shaping drumlins.
• 4The Younger Dryas Impact Hypothesis may provide insights into the conditions required for drumlin formation.
• 5The quantities of water involved in creating drumlins are described as 'absolutely astounding'.
• 6The origin and formation of drumlins remain contentious and controversial in the scientific community.

Glossary terms

Source

Transcript excerpt

That's ancientnutrition.com, code protein. This is Cosmographia, the Randall Carlson Podcast. And welcome back, ladies and gentlemen, to Cosmographia, the Randall Carlson Podcast. We have a very special show for you today. Brad, why don't you introduce our guest for us? Well, this is Jerome Lessman that we've been talking about for quite a few episodes. Come to talk about drumlins. I met him back in 2009 at a GSA field trip into the scab lands. So we were in the same van. And I got to hear a lot of the alternative viewpoints of what we were seeing versus the standard story from some of the leaders of the trip that I guess it was four or five days. Yeah. So we spent quite a bit of time together. So then he's from now with the Vancouver Island University as a teacher there also and was good enough. Randall's brought up in 2017 to spend four days with us and took us up into the Drumlin fields on the Thompson Plateau. And we've got some pictures and I'm sure he's got a bunch of cool maps, which I love. And we're going to get into who knows what all. But Drumlins is the starting point. And well, Randall will tell you later, there's a Drumlin behind him. There's Drumlin behind me. And then we've got a Drumlin expert. So that's the big topic for tonight. Drum, welcome. Thank you. Thanks for having me. I'm happy to be here. Always good to see you guys and have a chat about all these interesting things. So I'm looking forward to it. Yes, we are. We are looking. Yeah. We've talked about Drumlins, kind of alluding to Drumlins frequently throughout this. But we'll hold back. ...

Excerpt from Kosmographia, Oct 8, 2020. Rights remain with the original creators. Hear the full episode at the source.