gla
cia
tion
Plural
glaciations
1
the geological process involving the expansion and movement of glaciers, shaping landscapes through erosion, deposition, and the formation of distinctive glacial landforms
- The Great Lakes were formed during past glaciation periods when massive ice sheets shaped the landscape.
- Glacial striations on bedrock surfaces provide evidence of the direction of ice flow during glaciation.
- Glaciation in the Pleistocene epoch left behind moraines, creating undulating terrain across many regions.
- The distinctive U-shaped valleys in mountainous areas often bear witness to the effects of glaciation.
- Glaciation played a role in shaping the iconic Yosemite Valley in California.
2
the state or condition of a region being covered by glaciers or ice as a result of glacial activity
- The valley's glaciation persisted for thousands of years.
- Glaciation left thick ice sheets across the landscape.
- Signs of past glaciation are evident in the striated rocks.
- Glaciation affected both flora and fauna in the area.
- The mountaintop remained in glaciation year-round.