Image above: Lochans on Knockfin Heights/ © Copyright Mick Crawley (

Definition: Gently undulating land surfaces cut indiscriminately across underlying geologic structures and that is the end-product of a long period of erosion.

An extract from Godard’s (1965) map of erosion surfaces in southwest Caithness. The heavy lined shading is the Surface intermédiaire; the other lined shading is the lower Surface écossaise; the stipples show the extensive Niveau Pliocene.

The Surface intermédiaire (Godard, 1965) is preserved only as fragments in the Northern Highlands. Typically, these are flat interfluves at 375-500 m. One of the most extensive fragments forms the Knockfin Heights, the high, empty, sodden and peat-covered plateau that forms the watershed between the Glutt, Dunbeath and Helmsdale Waters.

Large Pools on Knockfin Heights

© Copyright Thomas Byrd (

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