in the Forest of Dean Coal-field. 



219 



Should subsequent workings prove that the Horse does not extend through the 

 upper seams, it will be evident that the river of which the Horse had been the bed 

 did not cut through the superincumbent strata, but that its period of action was 

 antecedent to their deposition. 



In the workings of the Park End Colliery, in Park End High Delf seam, which 

 is the thirteenth in the series, and lies about fifty fathoms above the Coleford High 

 Delf, a great succession of lows has been met with in crossing the line of the Horse, 

 and similar to those on each side of it, but no " Fault " corresponding with the 

 Horse itself has been discovered. (See fig. 3.) 



The part of the Forest Basin where those irregularities occur is two miles 

 further to the S.E. than the point to which the Horse has been traced in the Coleford 

 High Delf in Vallet's Level. But whether those irregularities at Park End have 

 any connexion with the Horse has not yet been ascertained. The workings at Park 

 End are on the S.E. side of the Basin beyond its centre, where the strata rise in 

 the opposite direction from the point to which the Horse has been traced. 



The full extent of the Horse in the Coleford High Delf seam, and whether it has 

 affected any of the other seams, can only be ascertained by the future working of 

 the coal. 



The accompanying diagram (fig. 3.) shows the relative position of the Horse 

 and the Lows at Park End. 



About half a mile to the S.E. from the line of the section (see fig. 2. and fig. 3.), 

 in the direction of the Horse, is an extraordinary depression of the Coleford High 

 Delf seam of an oval shape, as represented by the tinted portion of the Plan, 

 marked F G. The centre of this part is considered to be twenty feet deeper than 

 the ordinary level of the seam round its margin ; but the coal has not yet been 

 worked in it. The fact, therefore, of the Horse presenting the same phsenomena 

 in this depression as it does on both sides of it, is yet to be proved, which will be 

 done ere long by the works now in progress. The present workings only skirt the 

 margin of this small basin, which has the appearance of having been a pool in the 

 bottom of the lake thus : 



Fig. 3. 



Horse 



2 f2 



