245 



Brought forward, 



ft. in. 

 . 231 0 



10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 



White sandstone, . . . 

 Coal and black shale, . . 

 Gray sandstone, .... 

 Gray sandstone slate, . 

 Black shale, ..... 

 Yellowish white sandstone, 

 Yellowish gray limestone, 



Coal, 



"White sandstone, . . 

 Bluish gray sandy slate, . 



33 0 



2 0 

 36 0 

 21 0 



6 0 



30 0 



5 0 



1 6 



5 0 



3 0 



373 6 



In this section, the quantity of shale altogether is 60 feet, the sand- 

 stone is 248 feet ; the sandstone thus constituting nearly four-fifths of 

 the volume of the cliff. 



I shall offer a few observations on these collieries separately. 



1 . The Salt Pans Colliery. — Here the rocks as they appear in the 

 low cliff at Bath Lodge, have a dip of about 1 0° to the south-west. 

 The coal was got at forty-five yards deep. Eour pits were sunk near the 

 shore, somewhat above high water mark, from time to time between 

 1749 and 1760. The bed was irregular in thickness, having been from 

 six to nine feet. As the first of these pits was forty- five yards deep, and 

 above sea-level, it may be said the coal bed was, on an average, about 

 forty yards below sea-level. 



About forty yards from Bath Lodge, and at the foot of the cliff im- 

 mediately opposite the hall-door, a second bed of coal was discovered 

 this year, by Mr. John Dunsmore, in this colliery. The bed is two 

 feet four inches thick, and its outcrop about thirty feet above the sea. 



These three circumstances — that is, the downthrow of the main 

 coal, the thickness of the bed that was worked, and the upper bed of 

 coal lately discovered —all go to show that this colliery is different from 

 all the others, in which there is but one bed of coal, four feet thick, all 

 above the level of the sea, as far as Carrickmore dyke. This colliery, 

 therefore, must belong to a part of the coal measures, either higher or 

 lower in the series than the other collieries, and must have been re- 

 moved from its original position with respect to the others by dislo- 

 cation. The last bed discovered lies from the cliff southward, and 

 appears to be still available for working, over the extent of this col- 

 liery. 



Nos. 2, 3. The White Mine, and Falbane. — In these the beds of 

 rock, us well as the coal bed, all have a gentle dip westward in the face 

 of the cliff. 



4. The North Star Colliery In this the rocks have an anticlinal 



position, the whole group of beds rising in the middle like a flat arch, 

 so that the outcrop of the coal in the middle appears to rise over the top 

 of the cliff, and to have been carried away there by denudation. From 



E. I. A. PEOC. VOL. X. 2 L 



