13 



and ftirther sooth, at May Hill ; and again, on the left bank 

 of the Severn at Tortworth, in Gloucestershire. The Gloucester 

 and Hereford Riilway exhibits a solitary section of these Silu* 

 rian beds, contracted into a few yards at Blaisdon edge, but 

 skirts within a mile the Woolhope upheavayon the leit bank, 

 which forms the beautiful landscapejfof theriver Wye, seen from 

 the lino near Iloim Lacy; and the Hereford and Shrewsbury 

 Kailway, cut through the old red sandstone, all but touches tbo 

 Silurian outlier of Tinker's II ill, between Woofferton and Ludlow, 

 and just exposes a junction of those rocks at the entrance of 

 the Tunnel at the latter place. The intermediate line, from DIaisdon 

 to Ludlow, a distance of between 40 and .5(1 miles, is altogether through 

 the old red sandstone, exposing good sections of strata, with every 

 degree ot inclination, and considerable beds of detritus. It is difficult 

 to ascertain or even approximate to the thickness of strata comprised 

 in such an area ; this must be sought for in the escarpments and ridgea 

 of the Black Mountain, and the river channels of South Wales, where 

 a good succession is observed, and which, when fairly invoked, give 

 an estimate of at least 10,000 feet. These strata in Herefordshire 

 are pierced by a single trap dyke at Bartestree, near the Hagley 

 dome, full particulars of which will be found iu the Silurian Sy tern, 

 as well as of a similar dyke at Brock Hill, on the left bank of the 

 river Teme, near Shelsly Beaucliamp, on the borders of Worcester- 

 shire. Let me add, that the name '■^ Silurian " was happily selected 

 by Sir Roderick Murchison to include the strata immediately belovir 

 the old red, prevailing over the territory occupied by the ancient 

 Silures and their nt^ighbours, and superimposed on the Cambrian or 

 older rocks of North Wales ; and the names of Ludlow, Wenlock, 

 Caradoc, and Llandeilo direct the enquirer to those districts where 

 be may find the strata instructively exhibited in a true descending 

 order. Carefully as these strata have been examined, there is still 

 detail to be made out, and abundant pleasure to be derived from their 

 identification. The zealous explorer need not fear but that he will be 

 rewarded with discoveries. The Hagley dome, replete with 

 interest, brought to light by the late Mr. Scobie, had escaped for 

 20 years all other explorers, including the stafi* of the Ordnance 

 Survey, who had bestowed with excellent results so much 

 time and strength on the oxaminatioo of the immediate district 



