THE COAST OF NOliTHUMBERLAND. 259 
18i Part of Trap- vein three inches thick, passing thi'ough a 
bed of Limestone and Shale, and connecting two Trap 
beds. 
19. The upper bed of Trap, mentioned at 18. 
20. Shale under 19. 
21. Limestone farthest removed from the T^ap, and un- 
der 20. 
22. ' '■ — eighteen inches froaoa the Trap. 
23. — - — next the Trap. 
24-. The lower bed of Trap, in which many minute particles 
of Iron-pyrites are disseminated. 
25. From a small mass of coarse Grit, imbedded in the 
Trap. 
26. From a small mass of Limestone in the Trap. 
27. Trap with imbedded Quartz and ' 
Carbonate of Lime. 
28. Trap with Cai'bonate of Lime. 
Forming small beds 
29. Impure compact Felspar. P'On the surface of the 
30. Trap with Quartz. f "^^^P^ 
31 7 
> Felspar inclining to Jaspt 
34. Limestone imbedded in Trap. 
35. Fine Sandstone under Trap. 
36. Limestone between 35, and Trap. 
37. Clay slightly inclining to Wacke, undei* Trap. 
38. Shale, under columiiar Trap. 
39. Trap, with compact Felspar. 
40. Limestone under 38. 
41. Quartz intimately combined with Felspar, an surface 
of the Trap bed. 
42. Shale, on which the Trap rests. 
43. Greenstone between 42 and 44; entire thickness of 
the bed, is shewn by the specimen. 
44. Upper part of the Limestone under 43, 
45. Central part of do. 
46. Clay inclining to Wacke. 
