734 



APPENDIX. 



described in Gough's edition of Camden's Britannia, vol. ii. p. 418. It took place on the 26th of May 1773. 

 The ground was much heaved up and down, 18 acres being moved, leaving a chasm 12 to 14 yards wide. 

 The course of the Severn was impeded by the mass which was advanced into it, and the river was flooded back. 

 According to Dr. Gough, shocks of earthquake, and which he compared to those of Calabria, were felt during two 

 days, throughout the adjacent country. 



I. 



Silurian Rocks of Cumberland and the adjacent tracts. 



In the course of this summer (1828) and since the greater part of this book was printed, I made a rapid 

 survey of Cumberland and the adjacent parts of Lancashire and Yorkshire, in which Professor Sedgwick and 

 Professor Phillips had indicated the existence of some equivalents of the Silurian Rocks. (See the small map 

 of England engraved in the corner of the large one.) 



The great mass of the slaty rocks of that region belongs unquestionably to the Cambrian system, and Pro- 

 fessor Sedgwick is disposed to think that the fossiliferous limestone of Coniston-water-Head is of the same 

 age as that of Bala. True Silurian Rocks, however, and of considerable dimensions, are interposed between 

 the Cambrian Rocks and the Old Red Sandstone, particularly along the southern boundary of the former. Such 

 are largely developed, for example, between Kendal and Kirkby Lonsdale, reposing near the former place on 

 Cambrian Rocks, and at the latter dipping under the Old Red Sandstone of the valley of the Lune. 



My attention was first called to that district by my friend the Rev. J. H. Fisher, vicar of Kirkby Lonsdale, 

 and, on recently visiting him, I added some fossils to a collection previously sent to me by him. Other 

 specimens are to be seen in the New Museum of Kendal, and Professor Sedgwick possesses some which I have 

 not seen. 



Orthoceratites occur, particularly 0. annulatum, PI. 9, f. 5, O. gregarium, PL 8, f. 16, and 0. eccentricum, PI. 13, 

 f. 16. Among the shells in the uppermost beds are casts resembling Avicula retroflexa, PI. 5, f. 9, and Cypri- 

 cardia amygdalina, PI. 5, f. 2 ; and in the same beds near Kendal, Atrypa affinis, PI. 6, f. 5, Leptcena sericea, 

 PI. 19, f. 1, some forms of Orthis, &c, one nearly resembling 0. canalis. On the whole, the shells collected 

 near Kirkby Lonsdale seem to indicate Upper Silurian, and those of the underlying strata near Kendal (which 

 I examined, however, in great haste) Lower Silurian. Professor Sedgwick will elucidate this subject, when 

 all the fossils collected shall have been properly examined and compared. The transverse section from the 

 Old Red Sandstone at Kirkby Lonsdale, through the Silurian System, to the old slaty rocks and the intrusive 

 granite of Shap, is particularly clear and instructive. 



K. 



Fossil Footsteps in the New Red Sandstone. 

 I may state, that the impressions of the feet of some unknown animal have been recently discovered by Dr. 

 O. "Ward on the surface of the New Red Sandstone at Grinshill, Salop (see p. 40), and that the specimens 

 (which I have not yet seen,) are deposited in the public Museum at Shrewsbury. I must also add, that prints 

 or footsteps of the Cheir other ium have been discovered in the red sandstone which occupies the promontory 

 of Cheshire, between the Dee and the Mersey. The most clearly-distinguished slabs are in the museum of 

 the Liverpool Institution : Dr. Buckland gave a notice of them at the meeting of the British Association at 

 Newcastle, and I understand that Sir Philip Egerton is preparing a more detailed account. In the mean time, 

 sections illustrating the strata have been communicated to the Geological Society by Mr. J. Cunningham, while 

 these pages are going through the press. 



THE END. 



