Twidale & Bourne: Geomorphology of The Humps, Hyden 
Figure 7. (A) View of west-facing valley-side slope where shadows emphasise major fracture lines and numerous rock basins. The 
wooded area of sheet remnants on the left skyline and boulders to the right mark Level II. The roughness of the granitic surface in the 
foreground is typical of The Humps. (B) Sheet structure exposed in a large alcove or armchair-shaped hollow on the northwestern basal 
slope of The Humps. Tafoni and triangular wedges occur at the base of the leading edge of the sheet structure. Note sheet remnants on 
right skyline, and slipped slabs near the figure. The black coating in left foreground is due to blue-green algae which favour the shallow 
channels carrying runoff from the slopes above. The vegetation to right has colonised the sand and clay accumulated in the floor of the 
alcove. 
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