1. How to recognise …a Roche Moutonnée
N.G. Ref NY
Honnister Pass in the Lake District

2. Ask some questions… Was the area once under ice?
What would the direction of ice flow have been?
What shape is the feature?
Of what is the feature composed?

3. Now for some answers… Here is the view down valley of the feature
Arête
Corrie
‘U’ Shaped profile
So – the area has been glaciated

4. Gently sloping smooth side
Some more answers…
Up valley
Down valley
So the ice went this way
Steep and rugged side
Gently sloping smooth side
Rock not sediment

5. Is there evidence of abrasion? Is there evidence of plucking?
Have a closer look
here
…and here
Is there evidence of abrasion?
Is there evidence of plucking?

6. The up-valley (up-ice) side
Smoothed rock with striations parallel to direction of ice flow

7. The down-valley (down-ice) side
Steep face
Plucked face
Now look closer!

8. The lee end
Much evidence of plucking

9. Ice smoothed (abraded) ‘stoss’ end
It all adds up to …
Asymmetrical profile
A Roche Moutonnée
Plucked ‘lee’ end
Ice smoothed (abraded) ‘stoss’ end
Formed of bed rock