Tunnel Ice

Tunnel Ice
Ice wall in a tunnel on the Gulkana Glacier in the Alaska Range
Side of an ice tunnel on the Gulkana Glacier

Looking up at the walls of an ice tunnel on the Gulkana Glacier. This was a chunk of “dead” ice, no longer attached to the main body of the glacier, so it no longer had any accumulation zone. This once sub-glacial chamber formed by meltwater is now just a small arch. Small might not be the right word, it’s probably 25 feet tall 40 feet across. The ice itself is full of inclusions of rock, dirt, and lots of air bubbles. I’ve included some more photos below.

CameraNikon NIKON D7100 (Current model NIKON D7500)
LensSigma 17-50mm F2.8 EX DC OS HSM for Nikon (For Canon cameras)
Focal Length 17.0 mm (25.0 mm in 35mm)
Aperturef/7.1
Exposure Time 0.01667s (1/60)
ISO160

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