Episode #058: Intense Rainfall Events in the Southern Appalachians
6January 25, 2021
Summary
In this episode, Randall Carlson explores the geological history of the southern Appalachian Mountains, discussing how perceptions of massive blockfields and sediment fans have shifted from gradualist to catastrophic interpretations. He highlights the significance of rare pluvial events in shaping the landscape and challenges established uniformitarian views. By analyzing geological deposits, Carlson emphasizes the need to reevaluate past theories about Earth's climatic changes.
Key Takeaways
- 1Studies beginning in 1960 analyze the causes of blockfields and sediment fans
- 2Transition from gradualist 'periglacial' effects to catastrophic rainstorm events
- 3Evidence of rare pluvial outbursts affecting regions from Virginia to North Carolina
- 4Discussion of features like boulder-choked creeks and giant potholes
- 5Recognition that modern processes are eroding rather than building these features
- 6Breaches in the 'gradualist' model highlight the need for new geological perspectives
Description
In this episode, Randall Carlson explores the geological history of the southern Appalachian Mountains, discussing how perceptions of massive blockfields and sediment fans have shifted from gradualist to catastrophic interpretations. He highlights the significance of rare pluvial events in shaping the landscape and challenges established uniformitarian views. By analyzing geological deposits, Carlson emphasizes the need to reevaluate past theories about Earth's climatic changes.