Episode #044: Megafloods - MARS, Missoula, Lake Agassiz
6September 13, 2020
Summary
Explore the drastic geological evidence of megafloods, specifically focusing on the Missoula Floods first identified by Harlen Bretz in the 1920s. This podcast examines the historical context of these floods and draws parallels with similar features observed on Mars. Join Randall Carlson and his guests as they uncover the implications of ancient flood events on Earth's past and future.
Key Takeaways
- 1Harlen Bretz identified the Missoula Floods in the 1920s after exploring the Channeled Scablands.
- 2The floods were initially thought to be due to accelerated melting of the Cordilleran Ice Sheet.
- 3Bretz eventually accepted a uniformitarian explanation of an ice dam forming and releasing a gigantic lake.
- 4Lake Agassiz and its outflow spillways are discussed in detail regarding their impact on the landscape.
- 5Megaflood features imaged on Mars indicate similar geological processes at work on other planets.
Description
Explore the drastic geological evidence of megafloods, specifically focusing on the Missoula Floods first identified by Harlen Bretz in the 1920s. This podcast examines the historical context of these floods and draws parallels with similar features observed on Mars. Join Randall Carlson and his guests as they uncover the implications of ancient flood events on Earth's past and future.