54 
PERMIAN BRECCIA OF LEICESTERSHIRE. 
Mar., 1892. 
sliam, a pebble apparently Palaeozoic (94), and a Carboniferous 
sandstone (98) ; and from Bootliorpe a fine-grained quartzite 
(66). From Stanton, a Charnwood asli (104), a rather fine¬ 
grained rhyolitic breccia (117), a volcanic grit (120), and a 
cone-in-cone specimen. From Packington, a burnisher ; from 
Donisthorpe, a cone-in-cone rock. The matrix from which 
the above fragments have been derived is itself a breccia, 
consisting of small angular to rounded pieces of various 
rocks imbedded in a gritty material more or less earthy. It 
is either of a dull red colour or more or less blotched with this 
tint. The specimens are enumerated after the order in Mr. 
Gresley’s diagram. (Plate 8.) (125.) The rock from 
Linton Colliery is more than usually argillaceous, and of a 
dull purplish-red colour, every part of it being much stained 
and glazed with iron oxide (perhaps tinted with manganese 
oxide). On the other hand, the matrix at the Coton Park 
Colliery is a loose, friable grit, made up of small and well- 
rounded fragments of quartz and various rocks. (114.) The 
mass of the Overseal breccia seems to consist rather largely 
of tiny pieces of a green slaty rock, not unlike some of the 
more flinty slates of Charnwood. A larger fragment of purple 
slate is present in the specimen. (109, 124.) The Stanton 
breccia also seems to consist to a great extent of minute bits 
of other rocks, greenish-grey and tints of red ; little chips of 
slate can be distinguished among the former. (122, 128.) 
The Oakthorpe rock is a warm red colour, rather sandy in 
aspect, but not very rich in quartz, with but little of the green 
material. The larger fragments are subangular to rounded. 
(115.) A small specimen from Wooden Box does not show 
much of the real matrix. It seems to be a speckled, reddish 
and greenish-grey grit, in an earthy ground mass, with but 
little quartz. (110.) From Woodville, the specimen contains 
pebbles of green or purple argillite, and of a quartz-grit in a 
gritty matrix, stained in places brown or purple. (118.) 
The small fragments of green slate noted above appear 
to be also abundant at Swadlincote. The grains, which 
consist of quartz, are not numerous ; they are mostly of a 
dull reddish material, all in a hard earthy cement. The 
larger fragments are generally rather angular. Mr. 
Gresley observes that the colour of the rock at 
Woodville and at Swadlincote is markedly greenish in 
contrast to the very red tint at Overseal, Stanton, &c. 
(121) Near Midway, on the Swadlincote and Woodville Junction 
Kailway, the green, slaty constituent seems to be almost 
wanting. The hard, earthy cement is present in greater 
quantity. The larger fragments seem generally fairly 
rounded, and a good many of them are vein quartz. (Ill, 
