304 W7VERAL BA90X IS WALES. 



The irregulari- £$. Th cse faults or irregularities arc not confined to the 



hiTolhe^in' cdgcs of th * strata > b,,t the y take S rantl ranges, through 

 the interior of the bason, generally in a north and south 

 direction, and often throw the whole of the strata, for 

 hundreds of acres together, 40, 60, 80, or 100 fathoms, 

 up or down, and still there is seldom any superficial ap, 

 pearance, that indicates a disjunction, for the largest faults 

 frequently lie under even surfaces. 

 It is not proba- 14. As every stratum rises regularly from its base to the 

 vdno^stratum SUI * ace ? ai1( * is frequently visible and bare, in precipices 

 remains undis- and deep dingles, and often discovered where the earth or 

 severed. so j l j s shallow in trenching, or in forming high roads, and 



by reason of the whole of the country within this boundary 

 being so perforated by pits, and so intersected by the various 

 operations of art and nature, it is not probable that any 

 vein of coal, iron ore, or other stratum remains undiscover- 

 ed in this mineral bason. 

 Their distribu- 15. Glamorganshire engrosses far the greatest portion of 

 countes°. ng thC coal and iron orc > Mon mouthshire the next in point of 

 quantity, Carmarthenshire the next, Pembrokeshire the 

 next, and Brecknockshire possesses the least. 

 Breakings out 16. The strata of coal and iron ore in *he last named 

 Brecknock-* "* count y> whicn arc the lowest in the bason, break out 

 shire. northward, and only take place in the three following 



distinct spots, viz. 1st. From Turch River (which is the 

 boundary between Lord Cawdor and Charles Morgan Esq.) 

 across the river Tawc and the Drin Mountain to the great 

 forest of Brecon. 2d. A corner of ground from Blacn 

 Romney to the north of Brynoer. 3d. Another spot, 

 from Rhyd Ebbw and Beaufort Iron Works, through 

 Llwyn y Pwll, near Tavern Maed Sur, to where it joins 

 Lord Abergavenny's mineral property. 

 Principal 17. Note. A principal fault is observable at Cribbath, 



fault*. where the beds or strata of the limestone stand erect, 



another, of considerable magnitude, lies between Ystrad- 

 vellte and Pendcrryn, where all the strata on the north side 

 of the bason are moved many hundreds of yards southward 

 (as at Dinas). 

 Limestone. 18. Note. The limestone appears to the surface all along 



the boundary line in the counties of Monmouth, Glamorgan, 



Carmarthen 

 4 



