Images

Landslide debris on the west fork of the Gakona Glacier. Note helicopter on right for scale! View to east.

View northward of mountain near Gillette Pass showing sackung features. Here the mountaintop moved downward like a keystone, producing an uphill-facing scarp. The main Denali fault trace is on the far side of the mountain and a small splay fault is out of view below the photo.

The Denali fault offset crevasses on the Canwell Glacier.

Right steps in the Denali fault trace on the Canwell Glacier caused large rhombehedral chasms to form. Patty Craw in background. This photo was on the front page of the Anchorage Daily News.

Helicopters and satellite phones were integral to the geologic field response. Here, Peter Haeussler is calling a seismologist to pass along the discovery of the Susitna Glacier thrust fault. View is to the north up the Susitna Glacier. The Denali fault trace lies in the background where the two landslides can be seen.

Peter Haeussler measures offset of the Susitna Glacier thrust fault.

The Susitna Glacier thrust fault southwest of the toe of the Susitna Glacier. The rolled over tundra reflects the fault trace.

View south along the Trans Alaska Pipeline in the zone where it was engineered for the Denali fault. The fault trace passes beneath the pipeline between the 2nd and 3rd slider supports at the far end of the zone. A large arc in the pipe can be seen in the pipe on the right, due to shortening of the zigzag-shaped pipeline trace within the fault zone.

Peter Haeussler examining the Denali fault trace on the Susitna Glacier to find matching ice surfaces to determine amount of fault offset.

Peter Haeussler prepares to measure the offset of a crevasse on the Canwell Glacier.

View southward toward Mt. McGinnis and two large landslides on the northeastern side. These slides had roughly 40 million cubic meters of material and travelled 10 km down glacier. This is the cover photo of the May 16th, 2003, Science.

The fault scarp created a waterfall in the transition region between the Denali fault and the Totschunda fault.

The fault scarp created a waterfall in the transition region between the Denali fault and the Totschunda fault.

Bone Creek, 5.5 meter offset measured here. The fault trace runs along the sharp bank edge at the right of the photo, from the bottom center toward the upper right.

View of Denali fault trace in Chistochina River valley.

View westward up Black Rapids Glacier at large landslides.

View westward up Black Rapids Glacier at large landslides.

Denali fault crossing stream near headwaters of Chistochina River. Stream offset was 4.8m. Perhaps better than the previous photo.

View westward up Black Rapids Glacier at large landslides.

View west over pass between Canwell and Chistochina Glaciers. Two fault traces here may indicate the glacier ice is influencing the fault trace.

West fork of Chistochina Glacier. Denali fault trace here is parallel to the moraine, indicating that the structure of the glacier ice is influencing the surface trace of the fault.