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1[mass noun] The process or state of being covered by glaciers or ice sheets.
- ‘Are these sea-level changes caused by continental glaciation?’
- ‘He concluded that discontinuity patterns resulted from ecological and geological barriers at high elevations, attributable mostly to the effects of glaciation and volcanism.’
- ‘In Illinois, levels of diversity drop precipitously, most likely reflecting one or more genetic bottlenecks in areas that were once covered by the Wisconsin glaciation.’
- ‘Geologically young, the Rockies exhibit faulting, glaciation, and volcanism, resulting in rugged, spectacularly scenic terrain.’
- ‘These hydrogeological conditions are controlled by relative land and sea level, erosion and deposition, the cold climate processes of permafrost and glaciation, and rock stress changes.’
- 1.1[count noun] A glacial period.
- ‘‘Geologically, it would be about 10,000 years old, as the last glaciations meant that entire area was covered with glaciers,’ he said.’
- ‘Minor glaciations may also have taken place in the earlier Ordovician early Silurian and late Devonian.’
- ‘Silt and varved clay, probably deposited during the last stages of Pleistocene glaciation, cover the entire floor.’
- ‘Similar deposits that accumulated during earlier glaciations occur at various levels in the geological column.’
- ‘An alternative view on uplift and climate change proposes that the Quaternary glaciations in the Himalayas could have enhanced uplift.’
- ‘For instance, during the Pleistocene glaciations, the high altitude areas were probably nearer to distinct kinds of open vegetation, while forests were retracting.’
- ‘The first extinction of the Precambrian, which largely affected stromatolites and acritarchs, has been correlated with a large glaciation event that occurred about 600 million years ago.’
- ‘We've had glaciations and we've had warmer periods, and vegetation would creep back as the glaciers were retreating.’
- ‘The Upper Palaeolithic occupies the second half of the last glaciation, ending 10,000 years ago.’
- ‘Their study by others led to the discovery of multiple glaciations, separated by interglacial periods.’
- ‘No polar glaciations are known during the Late Permian.’
- ‘Under these periods of glaciations, the seas would fall to levels about 400 feet below the present.’
- ‘During Pleistocene times this resulted in a glacial climate and widespread continental glaciations in high latitudes.’
- ‘Then came a warmer period between glaciations, and the stalactite grew.’
- ‘However, there have been at least four significant glacial episodes prior to the Pleistocene glaciations.’
- ‘During periods of glaciations followed by periods of thaw it is thought that the river was flowing at such a speed it was able to carry gravel from the glaciers and ice fields to the north and west.’
- ‘A popular view is that during the last glaciation a large ice sheet formed over the Tibetan plateau and that this ice sheet caused a similar split in jet-stream flow.’
- ‘The reason the large animals did not die out at the end of previous glaciations is because there were no previous glaciations.’
- ‘A final chapter reviews recent speculations on the causes of global glaciation.’
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