60 



THE GEOLOGIST. 



The general dip of the strata, about IS"*, is south-east, aud as we 

 proceed northward we pass over the lower beds in succession. There 

 are a few dislocations and faults, and in some parts the limestones are 

 thrown into wave-like ridges and hollows ; but the contortions are not 

 so remarkable as at Ho wick, Holy Island, and Scremerston. As the 

 greater proportion of the middle group of the mountain-limestone 

 rocks is seen here, the following section will be instructive, giving, as 

 it does, the strata in detail from the highest at Ebbs Nook, down to 

 the lowest which have been reached by pit-sinkings in the neighbour- 

 hood. It has been made out by repeated examinations of the coast, 

 collated with information derived from pit-sinkings, which has been 

 kindly supplied to me by my fiiend, Mr. William Wilson, the intelli- 

 gent manager of the Shilbottle Colliery. The lower strata from 

 No. 68 downward are taken entirely from pit-sections. 



SECTION. 



9. 

 10. 



Ebbs Nook ]Magnesian lime- 

 stone, containing Pro ductus 

 giganteus, Spirifcr I/vcatv.s, 

 Chcctetes septosus, Lithostro- 

 tion basaltiforme, Syringo- 

 pora ramulosa, d-c. . . . 30 0 

 R ed, flaggy sandstone, ripple- 

 marked 4 0 



Shale, reddish at top, darker 

 and carbonaceous in lower 



beds 20 0 



Coal 12 



Fire-clay and sliale ... 7 0 

 Flaggy sandstones, micaceous 

 along the lamiu;\^ ; with 

 borings of annelids? . . .30 0 



Shale 5 0 



Sandstones with ripple- 

 marks, false-bedding, and 

 worm-casts and trails . . 40 0 



Shales 27 0 



Limestones, generally blue ; 

 some beds dim, weathering 

 buft' ; a calcareous shale, 

 2 ft. 6 in. is interstratitied : 

 — Producfus giganfcus, Au- 

 lopJij/IIum fu.ugifcs, lOc. . 28 0 

 Coal mixed with shaie ..06 

 Arenaceous shale .... 1 0 

 Sandstones, some blotched 

 and red, othei"S flaggy ; 

 Stiginaria ficoidcs in upper 



16. 

 17. 



18. 

 19. 

 20. 



21. 

 22. 

 23. 



24. 

 25. 

 26. 



27. 



28. 



beds, annelids in flaggy 



beds 24 0 



Shale with non stone-nodules 15 0 

 Limestone, generally blue : - 

 — the basaltic dyke cuts 

 through these beds near 



the shore 18 0 



Coal 0 6 



Grey shales with ironstone- 

 nodules 10 0 



Blue shales 15 0 



Grey slaty sandstone ...50 

 Coal {stony coal) — this is very 

 nearly in the same position 

 in the series as the fine 

 "Shilbottle-seam" ...10 

 Slaty sandstones .... 8 0 



Blue slates 7 0 



Slaty sandstones aud sliales 

 — some beds are ripple- 

 niarked, and the vein of 

 Galena is seen crossing the 



sandstone 37 0 



Sliales 10 0 



Limestone, daik .... 6 0 

 Grey slaty sandstones and 



sliales 27 0 



Calcareous shale ; with many 



fossils 3 0 



Limestones much contorted ; 

 the upper beds impure, but 

 the middle and louver make 

 good lime. These beds Avere 



