TATE — ON THE GEOLOGY OF BEADXELL. 



61 



43. 

 44. 

 45. 

 46. 

 47. 

 48. 

 49. 

 50. 

 51. 

 52. 

 53. 



worked liere until lately ; 

 and also at North Sunder- 

 land, Aviiere they are brought 

 in tlirough the undulations 

 and faults of the strata. 

 They are veiy fossihferous. 24 0 



Coal 0 8 



Fire-clay and shales . . . 10 0 

 Sandstone, upper beds slaty. 30 0 

 Carbonaceous shales with 



ironstone-nodules . . . 10 0 

 Limestone, dun and impure 



— Productus giganteus ..40 

 Carbonaceous shales . . . 12 0 

 Coal (" BeadneU-coal"). Va- 

 ries in thickness from 2 ft. 

 6 in. to 6 ft. ; the average 



about 3 0 



Sandstones and slaty sand- 

 stones with Slgiilaria 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 sliales 22 0 



Limestone 2 6 



Grey slaty sandstones ... 6 0 

 Fire-clay 'and shales . . . 30 0 

 Coal {stone-dose-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 



58. Grey shale 9 0 



59. "White sandstone . . . . 12 0 



60. Blue shale 36 0 



61. Limestone, impm-e ... 6 0 



62. Coal 0 9 



63. Fu-e-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. Fu'e-clay 48 0 



73. Limestone, light-colom-ed . 6 0 



74. Coal, mixed Avith sandstone. 2 0 



75. Shales and slaty sandstone . 15 0 



76. Limestone, impure ... 2 0 



77. Coal 2 0 



78. Sandstones 150 0 



79. Slaty sandstone . . . . 30 0 



80. Blue shale 6 0 



81. Elard 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 haviDo- an acra'repfate thickness of 171 

 feet. Most of them are of a bluish 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 fossihferous ; and the 

 following list, though far from complete, will show how rich it is in 

 organic remains : — 



FISH. 



A few remains of fish appear, viz. — 

 Megalichthys Hihberii,^ Ag. (scales, of a 

 quadrate form, one inch across.) 



Cladodus mirabilis, Ag. (teeth). 

 Cochliodus magnus, Ag. (teeth). 



CRUSTACEA. 

 Griffithides Farnensis, Tate. 



