98 



THE GEOLOGIST. 



Ft. in. 



Equivalent to the Stone 



vein of Pontypool and > Lower Four-foot 6 6 



old coal of Ebbw-vale. ) 



Yard Vein 2 0 



The aggregate being about 48 0 



Many good fossils have been obtained from these measures, the 

 " Filed coal" yielding numerous plants, as it does also at Blaina and 

 Beaufort; while many of the veins of iron-ore abound in shells, 

 principally Unio aquilius and JJ. centralis. I must not forget to 

 mention a small seam of coal, seldom above two feet thick, which hes 

 immediately above the " Farewell" -rock, and is the most constant 

 seam in the whole basin. It is known at the different works as 

 follows : 



Ft. in. 



Pontypool Little Coal 1 6 



Yarteg Brass Coal 1 0 



Blanafon Engine Coal 2 4 



Nantygls Big Vein 1 6 



Beaufort , Big Vein 1 6 



Blaina Little Vein 2 0 



Ebbw-vale Bottom Vein 2 0 



Rhynmey Rough Pin Coal 1 4 



Dowlais Lumpy Vein 1 3 



Hirwain Knobby Vein 1 6 



Onllwyn Cnapog Coal 1 6 



Yniscedwin Clas-vach Coal 2 6 



In most of these places it is characterised by fish remains, and, in- 

 deed, almost every specimen I have (from six or seven species), 'have 

 been found in this coal, showing that they were not of mere local oc- 

 cuiTcnce, but were general over the whole field at this period of the 

 coal-era. This will account for the fact that hitherto I have not 

 heard of any fish in the upper measures. 



The scenery as we journey down the Sirhowy and Rhynmey 

 vnlloys is very wild and pictui-esque, and but little spoilt by the 

 cHillu^rics which, as a rule, are planted on the high grounds between 

 the vjilk'ys, working the Mjmyddswlyn-coal. Of course no tourist, 



