12S 
REPORT—1847. 
■Hie Oxford clay immediately overlies the corubrash at Thorpe Aychnfdi, i 
which localitj' the latter bed contains^ — 
Tereb. lagcnalis. 
-obovata. 
Avicala echioata. 
Modiola biportita } 
Triitonia clavellata. 
Aaipbidesma securiforme, Phil. 
Clypeua orbicularis. 
Scrputa ioteatiaolis?, a large species. 
The corubrash is also well-developed at irebester near Wellingborough, Bolffki, 
and Chesterton, and also in the railway between Peterborough and Walton. 
'^c great oolite forms the chief portioo of this district, and is composed of i 
variety of beds, of which the following may be considered as the principal;— 
I. Laioinated sandy clay and shales. 
8 . Coarse pisoUtic shelly rock, more or less indurated Barnack rag, W'eldon itooe. 
3. Compact freestone .Ketton and Casterkm. 
Buif-colourcd marly limestones, sometimes oolitic. 
6 . Onlitic ragstone. 
6 . CoIcarRO-sUtceous Jlaggy beds, splitting into slates. 
llw aectiona are well-exposed in the following quarries and cuttings of rsilffsr, 
vix. entrance to Wansford tunnel, Barnack, Casterton and Ketton, Wittering, Bar- 
leigh, Stamford. Easton, Coliyweston, Geeston, Blatberwick, Dean, Corby, KirtiT. 
from which are exti’actcd the following sections, viz. at Ketton, Coliyweston, sad 
Geeston. 
Amphidesma decurtatum, Piif. 
Pullastra peregrina, PMl. 
Panopsa gibbosa. 
Fholadomya Murchisoni 1 
Lima rigidulunt, PkU. 
Upper part of tlic great oolite, as displayed at Casterton and Ketton quarries. 
White Bundy clay, very foRsilifcrrms... ... 
Laminated gray sandy clay with patches of sliells arid plants.... 
I ellow clay, finely larainateii . 
I>ark clay, very fossilifcruits, containing layers of the genus Netsra 
Irregularly stratified blue cluy. . . 
CnrhonaceoiiB sandy clays. 
Indurated sand and marly clay, mottlrf. . . . 
Orange and gray sand. 
Dark marly sandy clay (fossiliferous) .*!*. . 
Orangr-colourcd sandy clay. 
Pisolite, very friable fBamack rairl ... . . ! 
Crystalline oolite..... 
Ketton freestone . ... 
Jifeet 
If 
2i 
li .. 
3 
3 „ 
7 „ 
1 
i.. 
f >1 
Lower part of the great oolite series in Coliyweston quarries. 
^uipact oolite in shivers. 7 feet 
Oolitic freestone .' .. 2 ^ „ 
Marly oolite with Nerintea, ferns (PecM/erw &c. 2J „ 
CoiRTctionary sand-bed. ^ l] „ 
Compact cryst^ine ragstone, AWnaa aod F^s' U » 
Bniwn robbly mcohereut sand with concretions. 2 
olate beds. 
Geeston (Railway cutting). 
Bubbly oolite in ahivera .... . 3 „ 
Compact marly limestone, Kermtsa and Ferns’!*.’!!"”!.'.’!.’!!..’.’.'.’ 2i „ 
.Marly rwk, very fossiliferous, /Vma/M, Modiola plicata, Ferns, 
and incardia mmcmtrica. Pinna, Area .. ........ 2 „ 
Sandy rock, with Lima. See . 2 
CryitalUne ragstone, with Nerbupa audpatch^’of 'pirn’ts...!..!.! 3 „ 
Compact crystalline iHilitlc ragstone .S.. ... 8 „ 
Concretionary bod... 2i „ 
Slate beds ... 3 
Grrenish clay. !.!!!! ... 2 
Ferruginous sand of inferior oolite at bottom, 
he laminated sands and clays of Ketton and Casterton appear to thin out sontli- 
