488 T. G. Cantrill — Coal-boring at Presteign, Radnorshire. 



36. Grey shale and hard dark-grey grit 



37. Grey limestone 



38. Dark-grey limestone and shale partings 



39. Grey limestone . . . 



40. Grey shale with dark-grey grit 

 . ,41.' Grey shale with veins of spar 



42. Grey shale 



43. Grey shale with spar veins 



44. Soft grey shale 



45. Grey shale 



46. Grey shale with spar veins 



47. Grey shale 



48. Grey shale, broken 



49. Soft grey shale 



50. Grey shale, broken 



51. Grey shale 



52. Grey shale, broken 



53. Grey shale 



54. Fireclay 



55. Grey shale 



56. Grey shale and limestone 



57. Grey shale 



58. Grey shale, broken 



59. Soft grey shale 



At the time of my first visit the boring had reached a depth of 

 540 feet. The cores, which were all of small diameter, ranging 

 down from 3 inches to If inches, had been laid out in order on shelves 

 in a small core-shed. I broke up and examined samples taken by 

 myself from the cores at intervals of about 10 feet, but fossils were 

 disappointingly rare. Fragments of the trilobite Phacops longi- 

 eaudatus ? (March.) were extracted from a core, 2h inches in diameter, 

 that came from a depth of between 180 and 200 feet, and Mr. John 

 Pringle afterwards found in the same sample a minute fragment of 

 a graptolite, identified by Miss G. L. Elles as Monograptus vomerinns 

 (Nich.) or its variety M. vomerinus (Nich.), var. crenulatus, Tornq. 

 Traces of small brachiopods and trilobites, too imperfect for identifica- 

 tion, were noticed at various depths. Additional samples of 

 mudstone and limestone from the cores were brought to the Geological 

 Survey Office in March, 1914, by a person interested, but as their 

 depths were not known, they threw no further light on the Silurian 

 sequence, though Mr. Pringle extracted from them some Pentamerid 

 remains and a fragment of Phacops. 



It is scarcely necessary to add that no part of the cores examined 

 yielded a trace of a Carboniferous flora or fauna, and the record shows 

 that no seams of coal were found from top to bottom. The solitary 

 bed called " fireclay " (Item 54) can be dismissed as a band of sheared 

 and slickensided mudstone. The wonder is that more were not 

 recorded. 



The interpretation of the section presents several difficulties. 

 Item 1 is probably in part "made ground" or rubbish thrown 

 down the slope from the old limestone workings, as it was said to be 

 sandy and full of stones. In Item 4 can be recognized the mudstones 

 with argillaceous limestone-nodules that overlie the Woolhope 



