232 E. HILL AND T. G. BONNE Y ON THE 



than 1500 feet. The Timberwood-Hill coarse ash-beds are also 

 unknown on the eastern side. Considering their wide range to 

 the south, and their power of resistance to denudation (for they 

 almost always occur capping knolls), we should certainly expect to 

 find traces about Moorley Hill if they reached the surface. The 

 throw required to hide them would be about 2500 feet. If we 

 correlate the High-Towers slate-breccia with the Longcliff ash-bed 

 (a precarious identification), and on that basis calculate the throw, 

 the result is about 3000 feet. This may be considered a maximum, 

 for the Longcliff bed is below the position we should expect for that 

 horizon, and the accumulations of agglomerate may render the beds 

 about High Towers thicker than elsewhere. Thus on the whole 

 the throw of the fault at the northern extremity seems to be cer- 

 tainly between 1500 and 3000 feet, and probably a little over 2500. 

 The throw at the southern extremity has to be calculated by the 

 positions of the great slate-breccias of Blores Hill and Holgate Hill. 

 The uncertain position of the fault and the different directions of 

 strike again preclude exact calculation, but it is evidently far 

 smaller than that at the northern end. The best estimate we can 

 form makes it 500 feet. The dislocation therefore must diminish 

 to the south, and probably dies out not far beyond the limits of the 

 district. 



We estimated that at the northern end the western side of the 

 Forest is raised 2500 feet above the eastern. Professor Hull 

 estimates it as 2200 feet above the Coal-field. So near an equality 

 raises a suspicion that the two faults may be due to the western 

 region having been lifted in one mass ; but, according to Mr. 

 Coleman (quoted in Ansted, p. 23), the mountain limestone which 

 at Gracedieu comes to the surface, has been found at Sheepshead, 

 and therefore east of the anticlinal, at a depth of about 500 feet. 

 This leaves 1700 or 2000 feet of faulting which must have occurred 

 before the Carboniferous epoch. Thus the anticlinal fault, and pro- 

 bably also the present configuration of the country, must be to a 

 great extent Precarboniferous. 



The beds on the eastern side of the anticlinal seem on the whole 

 wonderfully free from faulting. It might be expected that the 

 syenite intrusions at NewclirT, Longcliff, and Buck Hill would have 

 disturbed the strata. We have as yet obtained no evidence of this. 

 In the country south of the Loughborough Lane, the positions of the 

 beds correlated on horizon 1 (at Forest Gate, the Hanging Bocks, 

 and the Brande) seem to show that no considerable dislocation can 

 exist. 



The case is quite different on the western side. We have shown in 

 Part I. (p. 764) that a fault lies between Holgate Hill and Old John. 

 This strikes west towards the syenite of the ruins. If the agglo- 

 merates of Old John and Ulverscroft Mill be, as we believe, the same 

 beds, another probably lies north of Old John, abutting on the 

 syenite in Newton Linford. We have suggested that these Ulvers- 

 croft-Mill beds are identical with those of Markfield (Altar Stone). 

 As the lines of their strikes, if continued, meet between the two 



