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Linton, D.L. 1955: The problem of tors. The Geographical Journal 121, 470-87

context. Thirdly, it should stand the test of time and still stimulate interest many years after its publication. There is little doubt that Linton’s (1955) ’The problem of tors’ has generally fulfilled all three criteria. The last condition has certainly been satisfied as the article and its ideas are still widely quoted in all levels of geographical literature, and the Two Bridges quarry on Dartmoor, a cornerstone of the theory as far as Dartmoor tors are concerned, is under tremendous visitor pressure. As for the first of the criteria, the article certainly stimulated considerable discussion at its time of publication, as witnessed by the length of the recorded discussion and the number of articles on the subject that appeared within a few years of its publication and which have continued to appear over the last 30 years or so. An analysis of the Science citation index reveals that the article is still extensively quoted. The second criteria is less easy to evaluate. The idea that tors were simply exposed corestones was one of the earliest hypotheses (e.g., Jones, 1859; Branner, 1896; Chalmers, 1898). Also, Falconer (1911) noted boulders or cores of unweathered rock in a deeply weathered profile in northern Nigeria, and Cotton ( 1917) came to similar conclusions while examining schist tors in New Zealand. Linton, although acknowledging some early work, did not include an appraisal of previous ideas in his article; this was left to later writers. Perhaps he may be criticized for this but he was certainly the first to formulate the ideas in general conceptual terms and to bring these ideas to a wider audience. In retrospect it appears to be a strange article. It is a mixture of deductive and inductive reasoning, argument by analogy and conjecture with a fair amount of special pleading. It is probably worth reminding ourselves of Linton’s basic definition of a tor as a ‘... residual mass of bedrock produced below the surface level by a phase of profound rock rotting effected by groundwater and guided by joint systems, followed by a phase of mechanical stripping of the incoherent products of chemical action’ (1955:476). The basis of the argument was a logical progression using evidence from exposures of weathered cor-