52 
PERMIAN BRECCIA OF LEICESTERSHIRE. 
Mar., 1892. 
with probably one or two rhyolitic fragments, also a little 
calcite or some allied carbonate. If I understand rightly, this 
specimen represents the second of the above-named boulders, 
but the accompanying note is not free from ambiguity. It 
is, however, certainly from “a large boulder in this find.” 
VII. —Specimens doubtfully Permian. 
Five specimens remain to be described. Of these one is 
spheroidal, three are very well rounded, and the fifth appears 
to be a very old fragment of a fairly rounded mass. I have 
kept them together, since the external appearance differs from 
that of most of the Permian fragments, and resembles that of 
the Bunter pebbles. As the two deposits in some parts of 
Leicestershire come very close together, it seems possible to 
me that in certain cases a pebble from the upper deposit 
might get into the lower. (28.) A rounded pebble of a rock, 
the matrix of which looks like an andesite with quartz, 
felspar, altered biotite, and a fragment of a rather different 
lava, but almost all the grains have a curiously fragmental 
look and several of the quartz grains are compound, con¬ 
taining also plates of the mica, and in one case part of a 
felspar crystal; in another example a small grain of felspar 
seems completely included, and the compound quartz has a 
clotted look as in gneisses. Mica, both white and brown, is 
also associated with grains of felspar. A few grains of (?) 
tourmaline occur, also apatite crystals. Can an igneous rock 
have broken through a gneiss and filled itself with small 
fragments ? Such a thing does happen. (23.) The slide is 
more quartzose than I should have expected. It shows grains 
mainly quartz, some iron oxide, probably some zircon, seem¬ 
ingly rolled, with a few rolled grains of tourmaline and (?) 
epidote. A similar rock is found as boulders in the coal at 
Dukinfield. The last two minerals occur in various old 
quartzites which I have described.* (43.) This seems to be a 
fine-grained dark quartzite. Under the microscope it consists 
of rather angular small quartz grains, a brownish mineral, 
probably decomposed felspar, and a bluish or greenish 
dichroic mineral (a secondary product both after the latter 
and as needles in a quartz vein), which I think is pretty 
certainly tourmaline, I found a pebble of the same rock in 
the Staffordshire Bunter, near Rugeley. (57.) A well-rolled 
pebble, which may have come from a long distance. It is 
a clastic rock ; the fragments are subangular ; a few probably 
See a paper by J. Badcliffe, “Quart. Journ. Geol. Soc. 
Vol. XLIII., p. 599. 
