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partly by tlie Walker's Earth, an unctuous clay which separates some of the 

 upper strata. Backbury Hill shows some plain results of such accidents : but 

 the most noticeable of all hapiiened in Queen Elizabeth's reign, Camden giving 

 the date 1575, but Baker placing it five yeai's earlier ; the scene of it was a 

 spot near the Putley Cockshoot, hence called the Wonder ; quaint notices of 

 it, by early authors, may be found in the "Silurian System." In 1844 a 

 slip of tapper Ludlow rocks took place on Dadnor's Hill, above Dorniington ; 

 a full account of it is given in the Hereford Journal of March 20th in that 

 year ; more than three acres of gi-ound, bearing 40 oak trees, slijiped a dis- 

 tance of 200 j-ards ; the effects of this slip may still be seen, although trees are 

 rapidly hiding the fallen mass. 



HAGLEY DOME. 



At about 100 yards W. of Hagley House, near Lugwardine, the uppermost 

 Silm-ian beds protrude through the Old Red Sandstone. This fact escaped the 

 observation of the geological surveyors, and was first noticed by the late Mr. 

 Scobie. By his request Blr. Strickland prejiared a paper for the Geological 

 Society, which may be found in their Quarterly Journal for November, 1852, 

 vol. viii. It would be well if we could obtain the permission of the Geological 

 Society to republish this paper for our own transactions, for, like all Mr. Strick- 

 land's papers, it is explicit and exhaustive. The quarry, where the protrusion 

 was seen, is now very full of rubbish ; but the visitor will have very little diffi- 

 culty in making out which are the lowest strata exposed ; these, he will find to 

 be the grey Upper Ludlow schists with the characteristic fossils, and immediately 

 above them are beds of yellow Downton Sandstone : between these two the 

 bone-bed should be looked for ; it is, indeed, but a meagre representative of the 

 corresponding rich stratum at Ludlow, but a careful search will be rewarded by 

 the discovery of some fine rays of Onchus and fragments of the remarkable 

 crustacean Pterygotiis. Carbonized remains of plants are very common here, 

 and especially some small round bodies, which Dr. Hooker having determined 

 to be spore cases of a Lycopod, has coined for the original plant the name Pachy- 

 theca gphferica. It is not unlikely that the Hagley Dome is but one of many 

 protrusions of Upper Silurian rocks which remain to be discovered in the un- 

 dulations of the Old Red Sandstone of our county. As at Woolhope, some 

 igneous rock, such as is visible at Bartestree, has been the upheaving cause by 

 volcanic action. 



BARTESTREE DIKE. 



In a quarry at Lowe's Hill, within half a mile S. of Bartestree chapel, a 

 dike of greenstone injected up a fissure in the Old Red Sandstone has been 

 cut through. A full account of this and the other trap-dike in this formation 

 is given in "Murchison's Silurian System," p. 185. The greenstone is made up 

 of the Silicates, hornblende, olivine, and felspar ; it has altered the strata in 

 contact with it, changing the marls into the semblance of amygdaloids. It 

 seems probable that the same upheaval which caused the Mordiford fault, 



