706 SEC. 16. - GEOLOGY AND MINING. 



ParbeckBeds - ... ' 200 



Surface. 



Portland Beds - - Sandstone - - - - 57-257 



f A variable set of strata ; chiefly"] 

 shales, and cement stones in . 

 Kimeridge Beds - { the upper part, with many beds } 1,512 - 1,769 



of sandstone and limestone in | 

 ^ the lower part -J 



Coralline Oolite - Oolitic limestone - 17 - 1,786 



? ? - Shales, sandy shales, and limestone 117 - 1,903 



1,903 



There is still some uncertainty as to the relations of the lowest 

 strata ; they may belong to the Oxford Clay, or they may represent 

 the lower Coralline series of Dorsetshire. This point will be 

 cleared np as the boring progresses. The greater part of the 

 Kimeridge Clay is very fossiliferous, some of the fossils being new 

 to England ; the least productive parts are- the highly calcareous 

 shales or cement stones ; some of the limestones are mainly com- 

 posed of small oysters ; an example is shown in the small core at 

 the side of the case. 



The smaller diagram gives a section of the Cretaceous and Oolitic 

 rocks of the south-east of England ; distinguishing those previously 

 known in that area from those discovered by the boring. The 

 same point is brought out in the horizontal section, which also 

 serves to illustrate the structure of the Wealden area. A simple 

 inspection of these diagrams will show the amount of information 

 already obtained by the boring. If the Paleozoic rocks should not 

 be reached, the boring will still have yielded most valuable results, 

 for we shall have acquired a knowledge of the Oolitic strata of this 

 area, such as could not possibly have been obtained in any other way. 



Some valuable beds of Gypsum were discovered in the Purbeck 

 Beds ; these are now being worked, giving rise to a new branch of 

 industry in Sussex. 



The position of the boring is shown in the Geological Model of 

 the Weald which is exhibited in an adjoining case. Further details 

 of the structure of the districts can be seen in the maps and sections 

 of the Geological Survey. 



3271* Geological Maps in relief, embossed in paper, of 

 ENGLAND AND WALES, after Sir R. I. Murchison, and THE ISLE 

 OF WIGHT, after H. W. Bristow, F.R.S. Henri/ F. Brion. 



3272. Model of Etna. Th. Dickert, Poppelsdorf, near Bonn. 



The model exhibited is a scientific work, much valued and used by all the 

 larger institutes of Germany for illustration in their science classes. 



