Files in this Data Supplement:
- Supplemental File 1 - Photo of a block forming a hummock with related streaks of sheared block facies in area 3.
- Supplemental File 2 - Helicopter view of the debris avalanche surface before the dam breach. Shearing and lithological markers are evident.
- Supplemental File 3 - Photo of an outcrop showing relations among facies in area 1.
- Supplemental File 4 - Photo of an outcrop section through a hummock showing facies relations in area 3.
- Supplemental File 5 - Photo of entrained-facies hummocks in the water-rich phase of the deposit, area 4.
- Supplemental File 6 - Helicopter view of the Meager barrier before the dam breach. Photo courtesy of D.B. Steers.
- Supplemental File 7 - Helicopter view of the Meager barrier after the dam breach. Photo courtesy of D.B. Steers.
- Supplemental File 8 - Sketch showing the inferred structural evolution of the west end of the plug. (A) First compressional ridges formed as the front started to decelerate. (B) The debris divided into different lobes, and strike-slip faults accommodated the differential motion. (C) This area stopped while the front was still moving. Normal faults accommodated the consequent extension. (D) Inset map of the west end of the plug. Extensional structures dominate this area.