JDart 1] GAULT A:ND lower GREENSAND near LEIGHTOlSr. 41 



notice for the present purpose are those of Jukes-Browne,^ made 

 for the Geological Survey in 1885, and recorded in his memoir on 

 the Gault. He saw at that time the following section in ' a quarry 

 worked for stone on the east side of the road,' which can be 

 identified as the long-abandoned working close to the old windmill, 

 about a quarter of a mile north of the village. 



Section at Long Cvendon; 1885. (A. J. Jukes- Browne.) 



Thickness in feet. 

 r'Claj^ey soil passing down into tougli grey claj% slightly 

 ' Gault.' -< micaceous and showing layers of darker and lighter grey ; 



(. impressions of JwocerawMs' 10 to 12 



f Brown ferruginous sandstone with small pehbles of quartz 

 'Lower i and lydianite; in places are lumps of calcareous stone'... 1 to 1^ 

 ■Greensand '*^ "Ihin layer of laminated grey and yellow clay; laminated 

 I clays with large lenticular concretions of heavy purple 



1^ ironstone' 2|- 



' Purbeck and Portland Beds, seen for ' 16 



The interest of this record centres upon the ' lumps of calcareous 

 stone ' in the bed below the Gault, as, under Jukes-Browne's in- 

 structions, the section was visited in the same year by the Survey 

 fossil-collector, Mr. J. Khodes, who obtained a few fossils from 

 the calcareous stone, which are preserved in the Survey collections 

 -at the Jermjai Street Museum. ^ These fossils, so far as they are 

 determinable, all belong to common forms of the Shenley Hill 

 limestone, and the matrix in which they are preserved is identical 

 with the common type of the Shenley Hill rock. The fossils are 

 registered as from ' Brickyard and Stone Pit, f mile N.W. of 

 Long Crendon Church. — Lower Greensand. Ferruginous sandy 

 clay and pebble-bed on Portland Oolite.' The rock is a reddish, 

 dense gritty limestone, with some ferruginous matter. The speci- 

 mens have received the following identifications in the Survey 

 Register :- — * Terehratida de])res&a ? Lamarck [J. R. 1656] ; 

 Terehratida capillata d'Archiac [J. R. 1658]; Terehrirostra lyra 

 Sowerby [J. R. 1677] ; Terehratella menardi Lamarck [J. R. 

 1660] ; Hhynclionella latissima Sowerby [J. R. 1678] ; Te7^e- 

 hratula [J. R. 1657, 1675] ; Cucullcea (fragment) [J. R. 1664] ; 

 ^erpula, Oidaris spine, and Polyzoon [J. R. 1667, 1680].' (The 

 numerals in square brackets are the Register Nos.) 



The Cucullcea of this list is Septifer lineatus (Sowerby), the 

 commonest lamellibranch at Shenley. 



The section was re-examined some years later by Dr. A. Morley 



^ ' The Cretaceous Eocks of Britain— vol. i : The Gault & Upper Greensand 

 ■of England' Mem. Geol. Surv. 1900, p. 277. 



2 I owe thanks to my friend, Mr. E. T. Newton, F.E.S., formerly in charge 

 of the Survey collections, for having written to call my attention to these 

 fossils in 1902, soon after my discovery of the Shenley fossiliferous limestone; 

 but I was at the time resident in Ireland, and the matter escaped my memory 

 until revived recently by the controversy respecting the Shenley deposit. 

 So far as I am aware, the fossils have not been mentioned in any Survey 

 publication, and are now recorded for the first time. 



