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Glaciation is nothing new…

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Presentation on theme: "Glaciation is nothing new…"— Presentation transcript:

1 Glaciation is nothing new…
Quaternary Period glaciations Gowganda glaciation

2 The last 1.6 Million years: The Quaternary Period
Today Quaternary Period About 1.6 Ma

3 Glacials and Interglacials
Ice sheets have advanced and retreated many times during the Quaternary Period Glacials and Interglacials Holocene: current interglacial Wisconsinan: Last major glacial

4 This bdy: ka Woodfordian advance (part of Wisconsin) Illinoian advance

5 Max Wisconsin ice coverage (Woodfordian)

6 Ice advances as LOBES

7 The geography of it…

8

9 Accumulation zone Ablation zone

10 Regelation Movement as supercooled water Pressure melting Refreezing
Glacier Flow of ice Bedrock Movement as supercooled water

11 Possibly done by clasts rolling along bed of glacier

12

13 Formation of a Roche Moutonnee

14 Plucking due to regelation

15 Regelation Pressure melting Refreezing Glacier Flow of ice Bedrock

16

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