106 Horner's Geological Address. 



above, is a Calamite at an angle of 45° : it appears to start 

 from a coal-seam below, an inch thick. 



b. Beneath this, 640 feet, a seam of coal three inches thick 

 occurs, and from it " there springs up an erect Sigillaria, 

 eighteen inches in diameter, and it penetrates the shale and 

 sandstone above it, five feet of the plant being visible.'* 

 Underneath the coal is " a grey sandstone with Stigmaria 

 ficoides {under clay). ^'' 



g. The next instance given is 1038 feet lower down, where, 

 from a grey argillaceous shale, rises an upright Sigillaria, 

 one foot in diameter, penetrating to a height of two feet into 

 argillaceous shale above. There are sixteen feet of sand- 

 stone and shale below this Sigillaria, and without Stigmari(E. 



^. The next is 270 feet lower, where, from an argillaceous 

 shale, " springs an upright Sigillaria of one foot in diameter ; 

 the lower part commences to spread." There are seven feet 

 of argillaceous shales, with ironstone balls, beneath this 

 Sigillaria, rvithout Stigmarice. 



r}. The next is 228 feet lower, where, from a " grey, 

 crumbly, argillaceous shale, like underclay, but no Stigmarim 

 visible, spring several upright Calamites, three of them in 

 the distance of two feet, and eight more, the whole eleven in 

 the distance of twenty feet." 



6. The next, 137 feet lower, in sandstone, are upright 

 Calamites, three in the space of a foot. 



/. From a carbonaceous shale, a foot thick, sixty-two feet 

 lower, " spring up erect Calamites, penetrating an arenaceous 

 shale above two feet ; and there are seven in the space of 

 eight feet.'' 



X. The next is 254 feet lower, where, from an argillaceous 

 shale, springs an upright Sigillaria, four inches in diameter ; 

 five feet of it are seen in a sandstone above. Argillaceous 

 and carbonaceous shale beneath, six feet thick, does not con- 

 tain Stigmarice. 



X. From a grey argillaceous shale, twenty-two feet lower 

 down, springs an upright Sigillaria. Its roots spread out 

 into the shale, which is ten feet thick, and does not contain 

 Stigmarice ; but over it lies a grey, crumbly, argillo-aren- 



