1859.] 



WRIOHT INFERIOR OOLITE. 



33 



Iiinnites abjectus, I'hit. 



Limea duplicate, Sow. 



Oatrea sidcifera, Bean, MS. 



Lima proboscidea, Sow. (oblong var.). 



Gryphaea sublobate, Desk. 



Pinna cuneata, Phil. 



Lima bellula, Lye. 8f Mor. 



Pecten Saturnus, d" Orb. 



Mytilus ungulatus, Y. iSf B. 



Modiola iinbricata, Sow. 



Ceromya Bajociana, d'Orb. 



Pteroperna plana, Lye. 



Gervillia Ilartmanni, Miinst. 



Trigonia costata. Sow. (small var.). 



gemmate. Lye. 



— — angulate, Sow. 



duplicate, Sow. 



Cypricardia cordiformis, Desk. (Cold 



Comfort, var.) 

 Area (moulds). 



Terebratida maxillate, Sow. 



Pygaster semisulcatus, Phil. 

 Clypeus Michelini, Wright 

 Hyboelypus agariciformis, Forbes. 

 Stomeclnnus germinans, Phil. 



The Lower Sandstones which crop out on the north bank of the 

 railway between Hutton and Castle Howard stations have recently 

 been worked for ironstone, and contain about 33 per cent, of iron. A 

 boring has been made at Mount Pleasant Hill, close to the Cromebeck 

 quarries, through the Inferior Oolite and underlying shales and 

 sandstones, down to the shales of the Upper Lias. This boring- 

 section affords an insight into the relative thickness of the shales 

 and sandstones which lie between the Millepore-bed and the Alum- 

 shale ; and therefore I give it in detail. The examination was made 

 by the engineer who had charge of the works*. 



('Inferior Oolite limestone (Millepore-bed) 



j Hard blue shale 



Millepore-bed <^ White sand 



I Ironstone 



Nodular ironstone 



Red Sandstone 



Freestone dogger 



Hard black shale 



Clay-ironstone (Hydraulic limestone ?)t 



Dry blue shale 



Top band of ironstone, fossiliferousj 



Hard callous shales 



Ironstone 



f 



- 



Dogger-beds 



Blue Wick 

 sands. 



Basement- oi 

 Btriatulus-bed < 



Upper Lias 



shales. 



Yellow drj shale 4 



Blue dry shale 



Black dry shale 



Blue dry shale 



, Black bard shale 



I Alum-shale 



' Hard dry shale 



I >r\ Band] shah' 



I Black day | pure) 



\_ Light-coloured clay 



ft. 



in. 



20 



8 



4 



ii 



9 











8 







4 



9 







2 







13 







3 



4 



8 







5 







2 



8 



1 



u 



4 



6 



4 











6 



6 



ii 



it 



6 



• ; 



• > 



•> 



ii 



3 



ii 



2 



6 



1 10 



2 



* The station-master to Castle Howard Station kindlj informed ma "i thii 

 Motion, and supplied me with n copy thereof. 



f This bed ia now being used in the manufi i men) 



| I la- ia the bed that ia raised for ironstone It- foaaila resemble, thoaa ul>- 



fOl t\ [, IAKI 1. U 



