TRIASSIC STRATA OF CUMBERLAND AND DUMFRIES. 377 



An Account of the Strata in Croft Pit [continued) . 



Description of Strata, 



Middle 

 Coal- 

 measures 



{con- 

 tinued). 



No. 



( SI- 

 58. 



59' 

 60. 



61. 

 62. 

 63. 

 64. 

 65. 

 66. 



67. 

 68. 

 69. 



70. 



71. 

 72. 



73- 

 74- 

 75- 

 76. 



77. 

 78. 



79- 

 80. 



81. 



82. 

 83. 

 84. 



85. 

 86. 



87. 



88. 

 89. 

 90. 

 91. 

 92. 



93- 

 94. 



95- 

 96. 



97- 

 98. 

 99. 



1^ 100. 



Brought forward 



Very blaek shivery slate 



Strong Coal, of a good quality, 9th ... 



Soft grey slate 



Very black Coal, loth; burns well ... 



Hard black shale 



Coal, mixed with pyrites, nth 



Argillaceous schistus, grey and brittle 



Blue rough argillaceous schistus 



Fine blue slate 



Freestone, mixed with ironstone 



Black shivery slate 



Dark-blue slate, very fine.. 



Dark-blue slate, very brittle 



Coal, 12th 



Soft grey argillaceous schistus 



Argillaceous schistus, mixed with freestone 

 White freestone, with fine particles ..... 

 Blue slate, striated with white freestone.. 



Light-blue slate, very fine 



Blue slate, a little mixed with ironstone.. 



Black shivery slate 



Coal, 13th 



Brownish hard slate , 



Strong blue slate, tinged with ironstone . . 

 Dark-blue slate, rather inclined to brown 



of a brittle nature , 



Blue soft brittle slate 



Coal, 14th , 



Lightish-grey brittle soapy argillaceous 



schistus 



Freestone, striated with blue slate , 



Fine blue argillaceous schistus, striated 



with white freestone...., 



Black slate, with hard, sharp, and fine 



particles 



Very light-blue slate, remarkably fine.... 



Coal, 15th 



Soft grey argillaceous schistus 



Black shivery slate 



Coal, i6th 



Strong lightish-coloured shale 



Blue slate, striated with white freestone . 



Ironstone 



Grey slate 



Strong white freestone 



Freestone, striated with blue slate 



White freestone 



Freestone, striated with blue state 



Thickness 



of each 



Stratum. 



Carried forward. 



ft. 

 417 

 10 

 o 

 o 

 o 

 I 

 I 

 3 

 4 

 3 

 3 

 6 



5 



o 



2 

 o 



2 



7 

 4 

 3 

 12 

 I 

 o 



9 



28 



3 



27 



5 

 4 

 2 

 I 

 3 

 3 

 o 



3 

 5 

 o 



m. 



5 

 3 

 4 

 3 

 8 



7 

 2 

 o 

 6 

 o 

 o 

 o 

 6 

 6 

 6 

 6 

 o 

 o 



7 

 o 

 o 

 o 

 6 

 o 

 6 



I b 

 o 6 

 o 6 



o 

 o 

 4 

 3 

 2 



3 



4 



4 



4 



9 

 6 



10 



I 3 

 3 II 



611 



2 c2 



