Glaciation (noun)

1. The process of covering an area with ice, especially as a result of glaciation.
2. The state of being covered with ice, especially as a result of glaciation.

Origin:

Early 18th century (in the sense "action of freezing"): from french glaciation, or from glaci- "of ice", from glacier, from latin glacies "frost, ice".

Examples:

1. During the last ice age, large areas of North America were covered by glaciation.
2. The process of glaciation is responsible for carving many of the landscapes we see today in mountainous regions.
3. The retreat of the glaciers at the end of the last glaciation left behind many distinctive landforms.
4. The study of glaciation is important for understanding past climate change and predicting future changes.
5. The effects of glaciation can be seen in the U-shaped valleys and polished rocks left behind by moving ice.