214 THE GEOLOGICAL STRUCTURE OF THE 



determination of its contained fossils, all that it is necessary 

 to do in correlation is to place it opposite tlie deposit of 

 another locality of the same date. This we have done in 

 the annexed Table for the strata of Dundry, and of other 

 south-western localities (see Table III. opposite). 



VII. Remarks on the Importaxt Features of 

 THE Dundry Strata. 



Some of the more striking features of the Dundry rocks 

 deserve our attention. We make the following notes : — 



1. The Marlstone Bock. 



The general characters of the rock are : — Coarse, yellowish- 

 brown, ironshot oolite — the oolitic feature almost universally 

 present, but most strongly developed in the upper por- 

 tion. 



The Marlstone Rock may be seen at Maes Knoll on the 

 western side of the camp, towards the base of the steep 

 escarpment, well within what is marked g5, Inferior Oolite, 

 in the Geological Survey map. It is also well shown in the 

 farmyard by the side of the road at East Dundry ; and here 

 again the line for Inferior Oolite on the Survey map is 

 carried well below its outcrop. 



Further, the Marlstone Rock appears on the hillside below 

 Watercress Farm ; and it has been disclosed in field-drains 

 opposite the Rookery. On the northern side of the escarp- 

 ment from New Down Lane by East Dundry to Maes Knoll, 

 it is shown at various points in the fields, and on the north 

 and west sides of the Knoll. We have also found outcrops 

 of the Marlstone Rock at several other points, but only in 

 that part of the hill which lies to the east of the Chew 

 Stoke road. 



In regard to the mapping of the Marlstone as Inferior 



