250 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. [Feb. 5, 



ft. in. ft. in. 



d. Dark blue clay, with shells, the tests occasionally 

 preserved 8 



e. Zone of chocolate-coloured indurated clay, thinly 



laminated 1 



f. Softer bed of chocolate-coloured clay — "the best 



for bricks" 4 



g. Yellowish clay 5 



h. Ferruginous band 9 27 9 



At the base of this section, is the Lincolnshire Limestone — an 

 oolitic freestone, similar to, and in the same position as, the upper 

 beds of freestone in the Ketton quarries. 



Fossils from the Upper Estuarine Beds, Stamford Field. 



Cyrena, sp. ? 



Modiola imbricata, Sow. 



■ Lonsdalei, Mor. ^ Lye. 



Neasra Ibbetsoni, Morris. 



Ostrea Sosverbyi, Mor. § Lye. 

 Pholadomya acuticosta, Sow. 

 Taiicredia angulata, Lycett. 

 Plants and wood. 



The beds of the Great Oolite Clay and Great Oolite Limestone 

 crop out upon the escarpment of a very considerable circuit about 

 this high ground ; and the presence of the Upper Estuarine claj r s 

 below is indicated by the occurrence of several brick-pits (in work or 

 abandoned), and by a considerable stretch westward of an^argil- 

 laceous moorland called the " Stamford Lings " — all upon the same 

 level. 



The freestone which appears at the base of the section in Tor- 

 kington's brick-pit, is traceable westward, along the face of the es- 

 carpment, to the public Cemetery (where it has a thickness of some 

 10 or 12 feet), and on to the foot of the "Lings," where it was formerly 

 quarried. 



The northern boundary of the " Lings " is part of the southern 

 boundary of Rutland ; and north of this, just over and below the 

 ridge, are the well-known Simpson's Little Casterton freestone 

 quarries ; the beds of which are geologically the same as those at 

 Ketton, and the stone only second in quality and reputation to that 

 of the older site : the fossils also nearly correspond. The freestone 

 beds are surmounted by about 15 feet of the Upper Estuarine clays, 

 which correspond exactly, in character and fossil contents, with the 

 same series in Torkington's brick-pit. 



Section at Simpson's Freestone Quarries. 



ft, in. ft, in. 



1. Upper Estuarine — Clay in various bands, and shelly 



zones, containing Neeera Ibbetsoni, Modiola imbricata, 



Pholadomya acuticosta, crystals of selenite, &c 15 



2. Lincolnshire Limestone — 



ft. in. ft. in. 



a. " Crash " — a soft freestone, crumbling upon 

 exposure to frost and atmospheric action, and 



useless as building-stone, in two courses 4 to 5 



b. " Bag" — an occasional pisolitic and shelly band, 



like the "Eag" at Weldon and Ketton nil to 9 



c. " Top Course " — good freestone 4 



