TATE — ON THE GEOLOGY OF BEADNELL. 61 
29. 
30. 
31. 
32. 
33. 
34. 
35. 
36. 
37. 
38. 
39. 
40. 
41. 
42. 
43. 
44. 
45. 
46. 
47. 
48. 
49. 
50. 
51. 
52. 
.53. 
worked here until lately ; 
and also at North Sunder- 
land, where they are brought 
in through the undulations 
and faults of the strata. 
They are very fossiliferous. 24 0 
Coal 0 8 
Fii-e-clay and shales . . .10 0 
Sandstone, upper beds slaty. 30 0 
Carbonaceous shales with 
ironstone-nodules . . . 10 0 
Limestone, diui and impure 
— Productus giganteus . .40 
Carbonaceous shales . . . 12 0 
Coal (" Beadnell-coal"). Va- 
ries in thickness from 2 ft. 
6 in. to 6 ft. ; the average 
about 3 0 
Sandstones and slaty sand- 
stones with Sir/'dlaria orga- 
num 17 0 
Coal 15 
Grey slaty and flaggy sand- 
stones 45 0 
Shales 8 0 
Grey slaty sandstone ... 6 0 
Shales 10 0 
Sandstones, some of the beds 
red 38 0 
Grey shales 22 0 
Limestone 2 6 
Grey slaty sandstones ... 6 0 
Fire-clay and shales . . . 30 0 
Coal {stone-close-coal) ... 1 4 
Grey slaty sandstone . . . 10 0 
Dark shale 5 0 
Slaty sandstone 10 0 
Dark shale 18 0 
Limestone 14 0 
Coal 0 4 
54. Grey sandstones and slaty 
sandstones 9 0 
55. Limestone 5 0 
56. Coal ("Swinhoe coal") . . 14 
57. Sandstones 27 0 
68. Grey shale 9 0 
59. White sandstone . . . . 12 0 
60. Blue shale 36 0 
61. Limestone, impure ... 6 0 
62. Coal 0 9 
63. Fire-clay and shales . . . 24 0 
64. Coal (" Fleetham coal," of 
good quality) 16 
65. Sandstones' 132 0 
66. Blue shales 33 0 
67. Sandstone 21 0 
68. Limestone 21 0 
69. Coal 0 4 
70. Slaty sandstones and shales. 60 0 
71. Coal 0 10 
72. Fii-e-clay 48 0 
73. Limestone, light-coloured . 6 0 
74. Coal, mixed with sandstone. 2 0 
75. Shales and slaty sandstone . 15 0 
76. Limestone, impm'e ...20 
77. Coal 2 0 
78. Sandstones 150 0 
79. Slaty sandstone . . . . 30 0 
80. Blue shale 6 0 
81. Hard stone 4 0 
82. Sandstone, coarse, white. . 15 0 
83. Blue shale 12 0 
84. Coal, good 18 
85. Slaty sandstones . . . . 27 0 
86. Coal (" main coal") ... 40 
87. Fire-clay 5 0 
88. Blue shale 42 0 
89. Limestone 4 0 
Total 
1,493 10 
There are in this section fourteen different limestones, varying in 
thickness from 2 to 30 feet, and having an aggregate thickness of 171 
feet. Most of them are of a bhiish colour and yield good lime ; many 
fossils characteristic of the mountain-limestone formation occur, espe- 
cially in the thicker sills and in the calcareous shales connected with 
them. The main limestone. No. 28, is the most fossiliferous ; and the 
following list, though far from complete, will show how rich it is iu 
organic remains : — 
FLSH. 
A few remains of fish appear, viz. — 
Megalickthys Hibberii, Kg. (scales, of a 
quadrate form, one inch across.) 
Cladodus mirahilis, Ag. (teeth). 
Cochliodus magnus, Ag. (teeth). 
CRUSTACEA. 
Griffithides Farnensis, Tate. 
