The existence of an inlier of Lower Palaeozoic rocks, concealed by Quaternary deposits, has long been inferred in Upper Wharfedale, in the vicinity of Kilnsey Crag. The evidence for this has been summarized well by Murphy & Warburton in their recent (2013) paper. However, we cannot accept their claim that a second Lower Palaeozoic inlier is present significantly farther downstream, near Appletreewick.

The exposure described and figured by Murphy & Warburton (2013) shows sandstone steeply dipping in a general NE direction which, if the dip were not interrupted by any major structure, would indeed take the strata under...

You do not currently have access to this article.