402 
MINERALOGY. 
[APP. N° I. 
13. Sandstone flag. 
14. Common sandstone, weathered. 
15. Calcareous sandstone. 
16. Coarse variety of common slate-coal. 
17. Bituminous shale. 
18. Slate-clay inclining to bituminous shale. 
19. Slate-clay with disseminated mica. 
20. Clay-ironstone. 
21. Grey, coarse spintery limestone, with imbedded por¬ 
tions of grey quartz and red felspar. 
22. Limestone, with imbedded fragments of bivalve shells. 
23. Arenaceous limestone, with scales of silver-white mica. 
24. Coarse grey limestone, with imbedded scales of mica. 
25. Arenaceous limestone passing into calcareous sandstone. 
26. Limestone passing into calcareous sandstone; the im¬ 
bedded minerals, quartz, mica, and felspar. 
27. Limestone, with imperfectly preserved pectinites. 
28. Greenstone. 
29. Greenstone, with minute plates of diallage or hyper- 
stene. 
Remarks. —The grey, often micaceous sandstone, slate- 
clay, bituminous shale, clay-ironstone, grey splintery lime¬ 
stone, and slate-coal, characterise this interesting series of 
rocks as belonging to a Coal Formation. On comparing 
the individual characters and general relations of these 
rocks, there can be little doubt of their belonging to that 
coal formation, in which all our principal British coal¬ 
mines are situated, namely, the Great Coal Formation, 
which lies upon old red sandstone and mountain limestone, 
and is covered in the regular series by magnesian limestone 
and new red sandstone. A few specimens of red gneiss and 
red granite were picked up on the beach; but these appear 
to have been accidental. 
