-of,I le „ c 



LIMESTONES. 



limc?t °neu 



he sizes ofi 



their 



quality 



Prions kind; 



w devoted 



•'', in Brit 

 his pcculiarin 



partly of 



vhicl 



i many 



*n subjecl 



irtly contai 



c 



«, little di^ 



| to them ^ 



torted & 



, limestfl 



5 



on 



it 



ch ind" ra 



69 



if- 



•rested 



ins CCIJ fli 



- . - 



shelly character is well shown in 41, 69, and 72, and the Upper 

 oolitic type in Nos. 58, 59, 60, and 74. The limestones GAiLEET * 

 are of all thicknesses up to about 100 feet, and on a large WaU-CMe43, 

 scale are intcrstratined with beds of clay and sand. Some 

 of our chief building stones are from the Oolite. They are 

 also occasionally burned for lime. — A. C. Ramsay. 





Limestones, Ironstones, &c, arranged and described by 



H. W. Bristow. 



1. — Purbeck marble. — Compact shelly limestone of 



freshwater origin 



& 



o 



s of Palut 

 Peveril Pt 



Dorset 



This stone furnishes the Purbeck marble which was 

 formerly extensively used, and is still ocsasionally em* 



1* V ! • 



LESS1C, ooln:: ployed in the construction of the slender shafts and columns 



Lias, and som of Gothic edifices, and for sepulchral monuments, instances 

 •Ivlianl.bu* of which occur in the Temple Church, London, and in 



jnl limestone* 

 tone-, and 

 >d ue in 



the second*! 



Windiest 



Westminster Abbey, 



the tomb of William Rufus. The slender shafts and columns 

 in the interior of Salisbury Cathedral are composed ot 

 Purbeck marble. (See also No. 9.) The Purbeck marble 

 used in the older churches has sometimes a pinkish tint, and 

 frequently weathers badly; most probably it was procured 

 from the neighbourhood of Swanage, from quarries which 

 are now exhausted. The stone raised at the present day, in 

 other parts of the neighbouring district is of better quality 



than the above, but has not the pink colour of the older 

 . marble. 



H.W.B. 



2- — Bala limestone, impure compact limestone. — Near 

 Bala, Merionethshire. 



This limestone is about 20 or 30 feet thick. It is always 

 fossilliferous, and is made up in great part of the relics of 

 Silurian life. It is also in general very impure, owing to the 

 mixture of ordinary sediment with the lime.— A. C. R. 



No 



