rrr 



una l6oe c , 



LIMESTONES. 



t 



^ 



^niestone 



red Burfact 



[ *>) compact 



us of /> w 



icn of ski 



other slid. 

 ?/< ire. Pre- 



it,) comps 

 v, comptf 



tone, con- 



Mo 





rate o 



atone,* 1 ' 



nil 



Id /'" ;( ' 



* C ol0« r/ 



« 



)^ 



5/^ 



rrrC/ 



jjfljf 



73 



26 - — Bal a limestone, very impure compact limestone Upper 



- ~ ' Gaxleey. 



wylfi 



exhibiting a weathered surface. ( S 

 Yspytty Evan, Merionethshire. 



27. 



28. — Carboniferous limestone, compact, light 

 limestone, with numerous fossil Corals, on a weatherecTsur- 

 face. — Middleton, Derbyshire. 



29.— Compact light grey limestone, forming the low- 



"Wall-case 43 



grey 



est bed of the 



Gloucestershire. 



bonif 



■Forest of Dean 



30.— Carboniferous limestone, (Compa 



lime ♦ 



stone.) 



Fro me, 



°1. 



Compact GREr limestone, containing bituminous 

 matter. — Point Levi, near Quebec, Upper Canada. 



Presented by Sir William E. Logan, F.G.S. 



32. — Carboniferous limestone, encrinital limestone, 

 chiefly composed of the stems of Crinoids. (See Nos. 5 and 

 1 4. )—Mold, Flintshire. 



33. — Bala limestone, impure, compact, grey limestone, 

 exhibiting a semi-concretionary character. — Two miles 

 north-east of Bala, Merionethshire. 



The banded or moulded form of its weathered surface 

 arises from running water having dissolved part of the lime. 

 It is also rudely and obliquely cleaved. 



34 — Carboniferous limestone, compact, grey lime- 



Dnnb 



ifi 



35 — Carboniferous limestone, {light grey, compact 

 limestone) .—Mitcheldean, Gloucestershire. 



Wenlock limestone, coralline limestone, princi- 

 pally composed of Catenipora escharoides Wood Green, 



May Hill, Gloucestershire. 



Quarried for lime burning. 



** The Wenlock limestone is the grand source of lime for 

 agricultural and building uses in the May Hill district, and 

 is for these purposes extensively quarried, in long continuous 

 channels, along the crests of woody hills, especially on the 



