Deformation of ice and sedimentMuch of the snout and sides is characterised by a vertical cliff and a ramp of mixed sediment and ice. |
![Deformation of ice and sediment Deformation of ice and sediment](icons/1_wright_lower_rt_margin_thrust.jpg) Prominent debris layer, mainly sand derived from the glacier bed and transported by thrust-faulting to the ice cliff edge. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/2_wright_lower_thrusts_with_sand.jpg) Close-up view of thrust-faulted sediment, revealing an ice core beneath. The original process of formation of the sediment was by fluvial action. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/3_wright_lower_thrust_sand.jpg) Bedding in fluvial sand, up-tilted by glaciotectonic processes. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/4_wright_lower_basal_sand_ice.jpg) Boudinaged layers of sand, with recrystallized ice between the boudins. |
![Deformation of ice and sediment Deformation of ice and sediment](icons/5_wright_lower_boudins.jpg) Sand blocks at the base of Wright Lower Glacier, representing a former continuous layer of fluvial sand, but rotated and deformed by shear.. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/6_wright_lower_basal_sand_ice_boudins.jpg) Close-up photo of a sand block, showing original lamination intersected by regelation ice veins. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/7_wright_lwr_foliated_sand_and_aeolian.jpg) The structure of the glacier-marginal sand ramp comprises near-vertical ice foliation with streaks of deformed sand. Several centimetres of wind-blown sand overlie the foliated ice/sediment zone unconformably. Runoff of water from the glacier surface on the right. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/8_wright_lwr_foliated_sand_and_ice_2.jpg) Detail of the foliated ice/sediment mix, with a tight fold in centre. Both clear ice and bubbly ice are present. |
![Deformation of ice and sediment Deformation of ice and sediment](icons/9_wright_lwr_foliated_sand_and_ice.jpg) Original fluvial lamination in sand within the ramp, showing cloudy ice layers, small faults and minor open folding. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/10_wright_lower_sand_deformed.jpg) Fluvial lamination with minor unconformities, up-tilted and slightly deformed in the glaciotectonised ramp. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/11_wright_lower_folded_sand.jpg) A V-shaped folded layer of sand within an ice layer in the ramp, illustrating intense deformation at the glacier margin. Also present are angular pebble/cobble-sized clasts of local bedrock. | ![Deformation of ice and sediment Deformation of ice and sediment](icons/12_wright_lwr_deformed_sand_and_ice.jpg) Sheared and folded laminated fluvial sand in the ramp, with bodies of glacier ice (from regelation?) partially replacing the sand. |
Photos Michael Hambrey, 2001. |