Glacier surface and cliffs

Wright Lower Glacier is cold, and a tunnel cut into the basal zone by Professor Sean Fitzsimons of the University of Otago, New Zealand, indicates temperatures well below zero degrees Celsius, and no clear boundary between glacier ice and the underlying sediment.

Glacier surface and cliffs
Field camp in front of Wright Lower Glacier with ice-marginal lake in background.
Glacier surface and cliffs
Aerial view of the southern side of Wright Lower Glacier with snow-bridged crevasses. Ross Island with Mt Erebus in upper left background.
Glacier surface and cliffs
The 2m-high rectangular slot is the mouth of the artificial tunnel into the basal debris zone of Wright Lower Glacier.
Glacier surface and cliffs
Wright Lower Glacier cliff and ice-contact lake, northern margin. An ice-coring sampling programme is underway on the lake-ice surface.
Glacier surface and cliffs
Low light emphasises the texture in the northern cliffs of Wright Lower Glacier.
Glacier surface and cliffs
Terraces and cliffs of Wright Lower Glacier on a cloudy evening, looking east. Fallen blocks of glacier ice lie on the lake-ice surface.
Glacier surface and cliffs
Layering emphasised by aeolian sand at the northern margin of Wright Lower Glacier. These structures are interpreted as thrust-faults.
Glacier surface and cliffs
Ice towers at the snout of Wright Lower Glacier.
Glacier surface and cliffs
Close-up of fracture planes in the ice towers of Wright Lower Glacier.
Glacier surface and cliffs
Shafts of sunlight catch the ice wall of Wright Lower Glacier’s northern margin.
Glacier surface and cliffs
Moat at the contact between the ice cliff and the ramp of ice and sand. The water has mostly drained through the gully on the right.
Glacier surface and cliffs
Ice ramp with an irregular veneer of sand close to Lake Brownworth.
Glacier surface and cliffs
Pinnacles at the margin of Wright Lower Glacier where it abuts Lake Brownworth. Aeolian sand lies between the pinnacles.
Glacier surface and cliffs
Towers and pinnacles with sheets of aeolian sand between.
Glacier surface and cliffs
Sun-etched serrated ice amongst the pinnacles of Wright Lower Glacier.
Glacier surface and cliffs
Complex group of pinnacles projecting above a sheet of sand.
Glacier surface and cliffs
Drained moat at the interface between the sand/ice ramp and cliffs of Wright Lower Glacier.
Glacier surface and cliffs
Transition from sand/ice ramp to alluvial plain, with towers and pinnacles of Wright Lower Glacier in the background. People for scale in the distance.
  
Photos Michael Hambrey, 2001.