1873.] 



SHARP OOLITES OP NORTHAMPTONSHIRE. 



231 



Glendon, (Nottingham, Rockingham, &c. 



Diverging from a north-east course, we will follow for a time 

 the range of the formation northwards. At Raven Wood, near 

 Glendon (two miles from Kettering), are ancient quarries in the 

 Lincolnshire Limestone ; which here has a thickness of about 8 feet, 

 and is disposed in the same number of courses, some of the upper of 

 which are more or less Oolitic. Towards the bottom is a hard band 

 containing numerous Nerincea eingenda, Bronn, N. triplicate, Bronn, 

 Pinna cuneata, Phil., Serpula, &c. 



It was these quarries which, in 1869, I had the privilege of 

 visiting (as stated in my First Part) in the company of Professor 

 Ramsay, F.R.S., Mr. Etheridge, F.R.S., Mr. Howell, F.G.S., and 

 Mr. Judd, F.G.S. ; and here, upon the very threshold, as it were, of 

 tbe formation, we found an abundance of fossils of sufficient signifi- 

 cance to stamp the character of this Limestone, as being distinct 

 from the Great Oolite Limestone of the Northampton district, and as 

 being as certainly a member of the Inferior Oolite series. 



Prominent among the fossils obtained and noted were : — 



Geryillia acuta, Sow. 

 Lima proboscidea, Sow. 



, large sp. (allied to L. grandis, 



Sooner) ? 

 Pecten personatus, Gold/. 

 Pinna cuneata, Phil. 



Cardium Buckmani, Mor. 8{ Lye. 

 Ceromya Bajociana, d' Orb. 

 Lucina despecta, Phil., var. car- 



dioides, d'Arch. 

 Myacites Scarburgensis, Phil., sp. 

 Pholadomya fidicula, Sow. 



Pholadomya Heraulti, Ag. 

 Tancredia axiniformis, Phil. 

 Trigonia hemisphserica, Lyeett. 



Natica Leckhamptonensis, Lyeett. 

 Nerinsea eingenda, Bronn. 

 triplicata, Bronn. 



Serpula socialis, Goldf. 

 sp.? 



Acrosalenia Lycettii, Wright. 

 Pygaster semisulcatus, Phil. 



Although the Upper Estuarine Clays are not seen in contact with 

 the Lincolnshire Limestone in the Raven-Wood section, they imme- 

 diately overlie it at a short distance eastwards. 



At a short distance to the west is a deep railway-cutting in the 

 Lower Estuarine Sands ; and at its north end, on either side, are 

 shallow quarries in the Ferruginous beds of the Northampton Sand. 

 So that the circumstances of the locality offer facilities for ascer- . 

 taining certainly the vertical sequence of beds there ; which is 

 represented in this gathered section, drawn from data taken by Mr. 

 Etheridge on the spot : — 



Section near Glendon Railway-cutting. 



Lincolnshire Limestone 



' Lower Estuarine Sands : — 



a. Brown Sand 



b. Plant-bed, with vertical markings . 



~3 w 



c. White Sands . 



ft. in. 



2 



1 6 



8 



jzj ^ Ferruginous beds 

 Upper Lias Clay. 



ft. in. 

 8 



11 6 

 10 



