136 ME. S. S. BUCKMAN ON THE BAJOCIAN [Eeb. I9OI, 



About I mile west of this, on the cross-road to Warren Farm, a 

 quarry showed ragstone which seemed to be Lower Trigo7iia-gTit ; 

 and a little more than ^ mile south-west on the main road, where 

 Lodge is marked on the Ordnance Map, there is similar ragstone. If 

 this be the Lower Ti^igonia-grit, the line marking the eastern limit 

 of this deposit beneath the Upper Trigonia-grit can be drawn between 

 these points and Bourton Clump, in continuation of the evidence of the 

 Harford and j^ston Cuttings on the Banbury & Cheltenham Eailway.^ 

 In the generalized section (p. 130) I have placed below the 

 Lower Trigonia-grit and above the Upper Freestone the following 

 strata : — 



Upper Snowshill Clay. 



Tilestone. 



Lower Snowshill Clay. 



Harford Sands. 



The sequence of these strata was only very incompletely observed ; 

 and the thickness of the Tilestone could not be ascertained. The 

 Bourton-Clump section supplies the evidence of Lower Snowshill Clay 

 parting the Tilestone from the Harford Sands. That it is Tile- 

 stone the very small Ostrece, which are very distinctive thereof, 

 seem to indicate. 



The Tilestone is best developed near the line of the old British 

 road, the Buggilde Street (see Map, PL VI), which runs northward 

 from Bourton-on-the Water over Cutsdean Hill past Hyates Pits, 

 and joins (or rather crosses) the Old Campden Eoad, another British 

 trackway, just beyond Snowshill. At Hyates Pits, and between 

 Horns Leazor and Scarborough Barn, were quarries where this stone 

 was formerly worked. It is a very fissile rock, characterized 

 by numerous small Ostrece; and it was used for roofing-tiles for 

 buildings. But the use of it has been discontinued now, and the 

 pits are filled in. I found in the neighbourhood the following section, 

 which gives evidence of clay above the Tilestone ; and at Small 

 Thorn, at a higher level, there is evidence of a considerable develop- 

 ment of Snowshill Clay. 



Sectio]!^ XI. — Cross-roads | 7nile south of Hyates Pits, and 

 about ^ mile from Scarborough Barn. 



Ft. 

 Upper Snowshill Clay. IX. 1. Clay, from evidence of in- 



fillings. 

 Tilestone. IXa. Fissile stone with small 



Ostrece about 14 



Note. — I presume that the fissile stone was formerly worked for roofing- 

 tiles. This seems to be the same bed as that at Hyates Pits. 



Then 1| miles farther south, there is evidence of a rock like the 

 Tilestone, overlying some clay-beds. 



^ See ' Cleeve Hill Plateau ' Quart. Journ. Geol. Soc. vol. liii (1897) pi. xlvi, 

 map of the Bajocian denudation. Then the Oolite-Marl line would run north- 

 ward parallel with this, and not so much to the east as on that map. A revised 

 edition of the map is issued with this paper, see PI. YI. 



