Malm Gulch, Idaho (1 of 2): angular unconformity & cool conglomerate at base of Challis Volcanics

This is part one of a two video series on Malm Gulch, Idaho. In this video, join geology professor Shawn Willsey as he explores the fascinating geologic story of the base of the Eocene Challis volcanics, a collection of volcanic and sedimentary rocks that were deposited in central Idaho about 45-51 million years ago. Investigate the angular unconformity and the amazing conglomerate layer that forms the base of the Challis volcanics. Learn how the underlying rocks were folded then eroded prior to energetic streams filling in the ancient topography with large boulders prior to the eruptive Challis episodes. In the part two video (will launch on July 10), learn about the impressive fossilized sequoias entombed in the Challis volcanics and how petrified wood forms. This area and many others are featured in my book, Geology Underfoot in Southern Idaho.

GPS location: 44.33838, -114.22362

I love doing these videos and will continue to do so but if you want to provide support or much appreciated gas money, you can send support via Venmo @Shawn-Willsey (be sure to put two L's in last name)

or PayPal: https://www.paypal.com/donate/?hosted...

or a good ol' fashioned check to this address:
Shawn Willsey
College of Southern Idaho
315 Falls Avenue
Twin Falls, ID 83303