190 PROCEEDINGS COTTESWOLD CLUB 1920 
in the Survey Memoir, 1 and taken as belonging to the 
Llandovery beds of the May Hill area, and in this conclusion he 
followed Murchison. 2 
Recently Dr. Callaway questioned this classification, and has 
given reasons for considering them to be of Precambrian age. 3 
The rock exposed in the quarry is in the main a fine hard purple 
grit, but this includes bands of a coarser rock also of a gritty 
nature. One of these bands contains thin flat fragments of 
green micaceous schist and rounded grains of quartz sparsely 
scattered through a finer matrix ; in another the fine matrix is 
almost absent and the band is almost entirely made up of small 
rounded, quartz grains ; while in a third the small rounded 
fragments in the main are of a fine purple felsitic rock. 
Yet another band has fair-sized felspar fragments embedded 
in a matrix of rounded felsitic material. 
Thus the Huntley Quarry beds may be described as grits, 
sometimes predominently quartzose, sometimes felsitic, some- 
times felspathic, and sometimes of so fine a texture that the 
nature of the fragments cannot be determined by the unaided 
eye. 
Fragments of similar grits are to be found for about 200 
yards on the hillside to the north of the quarry, and as one goes 
westwards there are occasional small exposures by the roadside. 
Here are to be seen more quartzose grits resembling some of 
those seen in the quarry throughout a distance of about 70 yards, 
while at a spot about 120 yards from the quarry on the south 
side of the road, just before where the side road to Blaisdon 
branches off, there is a small exposure showing a purple quartzite 
resting against a fine purple rock with bright green patches. 
This latter rock is a grit chiefly made up of small fragments of 
purple felsite, but containing also a few quartz grains and 
fragments of green mica-schist. 
In none of these roadside exposures can any certain dip be 
obtained, but about 300 yards farther on, just after the road 
has crossed the small valley, typical Llandovery Sandstone, 
dipping 22 0 west-north-west, is seen which is here made up 
1 Memoirs of the Geological Survey of Great Britain, vol. ii., pt. i. (1848), p. 183. 
2 Siluria, Ed. 1839, 'p. 442. 
3 Quart. Journ. Geol. Soc., vol. lvi. (1900), p. 57. 
