MIDDLE LIAS : STOW-ON-THE-WOLD. 219 
near Stroud, the section noted by Prof. Hull, between Mangers- 
bury and Oddington, being as follows* : 
FT. IN. 
Upper Lias - -----25G 
'"Band of ironstone - - 6 
Middle I Four beds of calcareous sandstone with part- 
Lias. "I ings of clay and shale - - - 15 
I Sand and sandy shale - - - about 25 
The band of ironstone was said to be filled with specimens of 
Ammonites annulalus [ ? A. Holandrci\ ; and, as remarked by 
Prof. Hull, it is very constant at the top of the Marlstone all over 
the neighbourhood. He noticed it at Daylesford, and south of 
Little Milton, and again at Dean near Chadlington. Probably it, 
represents the " Transition Bed " of Northamptonshire. 
Towards Upper Slaughter the Middle Lias is much concealed 
by tumbled masses of Inferior Oolite. Further south, along the 
borders of the Windrush valley, the beds are rarely exposed, and 
no sections have been recorded. In company with Mr. W. Topley, 
I saw traces of the Rock-bed, with Khynclionella teirahedra, north 
of Dodd's Mill, near Eissington ; but in this area, judging from 
the evidence of the Burford boring (see pp. 158, 221), and the 
absence of quarries, the Hock-bed is probably but a few feet in 
thickness ; while the lower sandy shales of the Middle Lias may 
not exceed 50 feet. Stiff clay with Ammonites margaritatus may 
occur below, as at Deddington. 
* Geol. Cheltenham, p. 20. 
