| The process of nivation follows, whereby a hollow in a slope may be enlarged by ice segregation weathering and glacial erosion. |
| It would at first sight appear impossible to distinguish between these changes through the results of nivation. |
| They are variously described as simple, compound, hanging, tandem or two-staired, intersecting and nivation cirques. |
| In this manner the depression is enlarged and deepened by the same process of nivation that inaugurated it. |
| He has adequately shown the manner in which that phase of nivation is expressed which we find at the border of the snow. |
| Thus far only those volcanoes have been considered which have been modified by nivation. |
