The Irish Ice Sheet

By Dr Sam Roberson, British Geological Survey, Belfast Glaciation of Ireland during the Devensian The island of Ireland has been glaciated many times during the Quaternary period.  The last glaciation in Ireland is referred to historically as the ‘Midlandian’, but now, the British-Irish term ‘Devensian’ is more commonly used. During the Devensian, the British-Irish Ice …

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Glacial erratics

What is a glacial erratic? Glacial erratics, often simply called erratics, or erratic boulders, are rocks that have been transported by ice and deposited elsewhere. The type of rock (lithology) that the glacial erratic is made from is different to the lithology of the bedrock where the erratic is deposited. For example, an erratic could …

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