256 . Mr. J. Lycett on the Upper Lias of Gloucestershire. 



The only authorities for the Upper Lias of the district are — 

 ' Outlines of the Geology of England^ by Couybeare and PhilUps, 

 1822; 'Outline of the Geology of the Neighbourhood of Chel- 

 tenham/ by Sir R. I. Murchison, 1834; the enlarged edition of 

 the latter work by J. Buckman and H. E. Strickland, 1845; 

 ' Memoirs of the Geological Survey of Great Britain -/ ' The 

 Geology of the Country around Cheltenham/ by E. Hull, Esq., 

 1857. In the first of these works the Upper Lias is only dis- 

 tinguished from the other members of the same formation by a 

 useful section given at page 252, exhibiting the succession in the 

 beds upon the western slope of the Cotteswolds at Painswick 

 Hill, by the late Mr. Halifax of Standish ; but their thickness is 

 not given. The following is the section, to which figures are 

 here added to mark the superior divisions : — 



'Inferior Oolite . . . . 

 'Very micaceous sand 



'Sand, with beds of unctuous, slaty, bluish clay 



/Blue clay with septaria 



/Thin beds of grey Lias-like marlstone 



'Lenticular balls of indurated marl with Ammonites and 

 parts of Fishes 



/Marly sandstone, a yellowish-brown sandstone, spangled with 

 mica, blue at the heart, abounding with large Belemnites, 

 Pectens, &c 



/Marl and clay 



/Clay, with veins of foxy earth containing ferruginous nodules 

 concentrically formed round a nucleus of Lias 



/Lias. 



10 



1. The lower portion of the Inferior Oolite; thick beds of 

 coarse, calcareous, shelly gritstone, more or less tinged with 

 oxide of iron. 



2. Tlie sands of the Cynocephala-stagc, with a shelly band at 

 the top, some flaggy argillaceous sandstones in the middle, and 

 a shelly band at the bottom. 



