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I—On the Dispersion of Shapfell Boulders and Origin of Boulder-Clay

Published online by Cambridge University Press:  01 May 2009

D. Mackintosh
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Extract

As the attention of geologists has lately been re-directed to the above subjects by Mr. S. V. Wood and Prof. Harkness, I venture to hope that the following notes and observations, made during visits to Wasdale Crag and the neighbourhood, on the 7th and 15th of last June, will not prove uninteresting to the readers of the Geological Magazine.

Type
Original Articles
Information
Geological Magazine , Volume 7 , Issue 74 , August 1870 , pp. 349 - 353
Copyright
Copyright © Cambridge University Press 1870

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References

page 349 note 1 Quart. Journ. Geol. Soc, Vol. xxvi. p. 90, paper read Dec. 8, 1869.

page 349 note 2 I was not present at the reading of Prof. Harkness's paper on the 25th of last May, but from the few lines of abstract in the fortnightly notices of the Geol. Soc, it would appear that, so far as the dispersing action of coast ice is concerned, his views agree with those advocated in this article.

page 350 note 1 According to Mr. Green, of the Geol. Survey, there is a Shap granite boulder in the village of Royston, near Barnsley, and according to the Rev. J. Stanley Tute, there are some Shap granite boulders in the brown clay west of Ripon. Is it certain that they all came over Stainmore Pass?

page 351 note 1 The number of large granite boulders on the surface of or rather slightly imbedded in the pinel and overlying loam, may have resulted from the continual dropping down of boulders from the floating ice, as the land became more and more deeply submerged, and after the accumulation of the pinel had, in a great measure, ceased.

page 351 note 2 Apart from the evidence the pinel presents of the action of ice, it somewhat resembles the brecciated part of the raised beach of Weston-super-Mare, which would appear to have been accumulated on a steep slope, as the land was sinking, and it is not very dissimilar to portions of the Old Red Conglomerate at the foot of Ullswater.

page 352 note 1 See Mr. E. Hull’s able article “On the Raised Beach of Cantyre,” on blockdetaching agency of the sea.—Geol. Mag., 1866, Vol. III. p. 7.