| Board walks take walkers through bog and tussock up to a moraine ridge overlooking the Otira Valley. |
| It is on actively moving glacier ice covered by rock debris called ablation or surface moraine. |
| We passed the trident, crossed over the hill and tumbled down a moraine the far side, our feet slipping on the loose rock. |
| A moraine is the ground up debris consisting of everything from giant boulders to fine rock powder which a glacier leaves behind. |
| In the distance, you can see other camps rising raggedly out of the moraine, each looking like it has just been through a ruinous siege. |
| Boulder clay, the most widespread deposit, represents the ground moraine of the ice sheet. |
