The Tarns of Lakeland
1895; Geological Society of London; Volume: 51; Issue: 1-4 Linguagem: Inglês
10.1144/gsl.jgs.1895.051.01-04.05
ISSN2058-105X
Autores Tópico(s)Geological Studies and Exploration
ResumoI ntroduction W hen discussing the origin of lake-basins, and maintaining the possibility of some of our English lakes lying in basins formed by earth-movement, I have often been asked whether I should consider that the basins of mountain-tarns could have been formed in that way. The difficulty of their being so formed seemed very great, and, supposing that they were true rock-bound basins, the conclusion appeared unavoidable that they were eroded by the action of ice. Some time ago I saw reasons for believing that certain tarns of Westmorland, though apparently in rock-basins, were not really so, and accordingly I have devoted some time during this year to the examination of a number of the tarns of Cumberland, Westmorland, and the Furness district of Lancashire, and now offer my observations to the Society as a contribution to the study of the origin of lake-basins, without in any way attempting to open up the question as to the origin of our larger lakes. A casual glance at many of these tarns shows that the stream which issues from them runs over solid rock close to the surface of the lake, and this appears to have been considered by some a satisfactory proof that the tam itself occurs in a true rock-basin. It is the object of this paper to show that such is not the case. All who have written upon the tarns of the district agree that there are some which are partially or wholly moraine-dammed at the exit (using
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