66 PROCEEDINGS COTTESWOLD CLUB 1910 



Upper Trigonia-Grit, Brodie thought there came " a coarse 

 kind of freestone about 50 feet thick, which took the place of 

 the Gryphite-Grit and rubbly ooUte [Buckmani- and Lower 

 Tn'gom'a-Grits] " of such places as Leckhampton Hill ; but 

 judging from some remarks made later by Lycett, it was the 

 Lower Limestone to which Brodie was referring, having 

 wrongly interpreted its stratigraphical position. 



To Brodie's paper were appended " Notes on a Section of 

 Leckhampton Hill," by H. E. Strickland." In this appendix 

 Strickland recorded seven subdivisions of the Inferior Oolite at 

 Leckhampton Hill : those enumerated in the left-hand column 



below : 



Subdivisions at Leckhampton Lycett's three main 



Hill subdivisions 



Trigonia-Grit . . . . . . "j 



Gryphite-Grit . . . . . . - Upper Ragstone 



Rubbly Oolite, with many fossils J 

 Fragmentary oolitic freestone . . \ 

 Oolite Marl . . . . . . y Freestone 



Freestone . . . . . . . . J 



Pea-Grit and Belemnite-Bed . . Lower Rag[stone] and 



Sands 



Brodie's paper was communicated on January 9th, 1850. On 

 July 30th of the same year, Lycett read one entitled 

 " A Tabular View of Fossil Shells from the middle divisions of 

 the Inferior Oolite in Gloucestershire."^ In connection with 

 the present subject, the chief point of interest is that he made 

 three main subdivisions of the Inferior-Oolite Series — those 

 stated in the right-hand column above. 



He also made a very laudable attempt to indicate the 

 changes that these three subdivisions underwent from north to 

 south. According to him, the lowest subdivision, the Lower 

 Ragstone and Sands, increases in thickness from two feet at 

 Leckhampton Hill to 40 feet at Stroud, and 70 feet at Bath. 

 The median or Freestone subdivision, he writes, " is somewhat 

 diminished at Stroud, and loses the greater portion of its 

 volume, including the Oolite Marl and all the upper beds 

 before it reaches Bath, where it is represented by 60 feet 

 of freestone " {loc. cit., p. 65). The Oolite Marl, it is true, dies 

 out a short distance to the south of Selsley Hill, and the Pea- 

 Grit disappears as an easily-recognizable horizon after Coaley 



I Quart. Joum. Geol. Soc. vol. vi. (1850), pp. 249-251. 

 3 Proc. Cotteswold Nat. F. C, vol. i. (1849-53), pp. 62-86. 



