CORNBRASH. 307 



Remains of Fishes {S/rophodiis, etc.), Saurians {Slcjicosauj-us), and 

 Lignite are occasionally met with. Many of the Mollusca are 

 similar to those in the Inferior Oolite or Fuller's Earth Rock.^ 



In the South of England the Cornbrash is not oolitic ; it is well 

 developed in Dorsetshire and Somersetshire. Among localities are 

 Radipole and West Chickerel, near Weymouth, Ryme, Yetminster, 

 Closeworth, Stalbridge, Henstridge, Cheriton, Wincanton, South 

 Brewham, and Road, near Frome. The maximum thickness in 

 this district, according to ]\Ir. Bristow, is forty feet.^ 



In Wiltshire the beds may be seen at Trowbridge, Corsham, 

 Chippenham, Stanton St. Quintin, Malmesbury, and near Cricklade. 

 At Swindon the thickness was proved to be eighteen feet in a 

 well-sinking. In Gloucestershire the beds occur at Fairford, and 

 south of Cirencester. 



In Oxfordshire, near Woodstock, the Cornbrash, six to fifteen 

 feet in thickness, consists of shelly limestones. Prof. A. H. Green 

 has noticed that here and there clay-beds occur which cause the 

 formation to swell out to more than double its average thickness ; 

 these clays are irregular, and never extend beyond small areas. ^ 

 The outcrop of the Cornbrash extends from Bicester to Bucking- 

 ham and Newport Pagnell. In Bedfordshire it has been termed 

 the Bedford Limestone. 



The Cornbrash occurs as a rather ferruginous limestone in the 

 Nene Valley, near Oundle, and Peterborough ; here its thickness 

 is about fifteen feet. Rushden, south of Higham Ferrers, in North- 

 amptonshire, is a noted locality for fossils, and there the Rev. A. 

 W. Griesbach collected an interesting series.'* The Cornbrash 

 occurs at Irchester, also at Overton Longville and other places 

 between Chesterton and Peterborough, and at Stilton in Hunting- 

 donshire. 



In north-west Lincolnshire the Cornbrash is shown by Appleby 

 Station, where it consists of a fossiliferous brown rag. Sudbrook 

 Park, near Lincoln, is a good locality for fossils.^ (See Fig. 42, 

 p. 278.) 



The Cornbrash of Yorkshire is a grey, marly, rubbly, and some- 

 times ironshot oolitic limestone, overlaid by ^z7«//(;-shales or 

 ' clays of the Cornbrash,' finely laminated grey shales, containing 

 Avicida ecfmiata, and these pass upwards into yellow sandy 

 mudstones, that occur at the base of the Oxford Clay. It is 

 well developed in Newtondale (10 to 14 feet), where (says Mr. 

 Hudleston) its ferruginous character tempted a speculator to work 

 it for iron, while in a secluded nook of the same lovely valley there 

 yet stands (1874) what was meant to have been a colliery — the 

 shaft was sunk to a considerable depth, in the expectation of 



' J. Buckman, Q. J. xiv. 119 ; Proc. Cotteswold Club, i. 262. 

 ^ See R. Damon, Geol. Weymouth, 1884, p. 17. 



' Geol. Banbury (Geol. Surv.), p- 30 ; see also J. Phillips, Geol. Oxford, p. 239. 

 * G. Sharman, in Judd's Geology of Rutland, p. 220. 



^ Rev. J. E. Cross, Q. J. xxxi. 122, 125 ; Jukes-BroMTie, Geol. South-west 

 Lincolnshire, p. 62. 



