92 PROF. GROOM ON THE CAMBRIAN AND _ [ Feb. 1902, 
these two types being found. In Winter Combe, on Raggedstone 
Hill," the prevailing rock is a coarse greyish-white quartzite, or 
grit, with some finer-grained quartzite. At the northern end of 
Midsummer Hill (see fig. 1) layers of quartzite and conglomerate 
Fig. 1.—Diagrammatic sketch of the small quarry in the Malvern 
Quartzite and Conglomerate, at the north-western corner of 
Midsummer Hill (M170). 
N. 
le i yy? 
SE oI ee Wage 
iE Scale: Vertical,!4inch= 4 feet. 
Horizontal, approximately 
the same. 
(Imper sistent layers of conglomerate are interbedded with grey quartzite (dotted 
in the figure). The fossil are most abundant in the uppermost band of 
quartzite, especially near the junction with the overlying band of con- 
glomerate. | 
alternate. The prevailing type is a fine-grained quartzite with tiny 
flakes of white mica, and often containing minute fragments of horny 
brachiopoda, chiefly referable to Autorgina Phillapsu. In, places, 
especii ae where the rock becomes a little coarser in grain, there are 
clear indications of lamination,and not uncommonly of false- bedding. 
Occasionally the rock passes into a sandstone of a chocolate- brown 
colour. Very commonly the grain of the quartzite or sandstone 
becomes coarser, and the rock then passes into a grit. The colour 
of the quartzite varies considerably : the commonest type is grey ; 
but greyish-white, or greyish- black, bluish-, greenish-, yellowish-, 
brownish-, pinkish-, or reddish- grey tints are frequently assumed. 
By the gradual or fairly sudden appearance of pebbles or subangular 
tragments, the rock passes into a pebbly quartzite, sandstone, or 
erit, and into somewhat coarse conglomerate, the pebbles of which 
may attain a diameter of 2 inches. 
A description of the materials of the Malvern Quartzite is 
reserved for a future occasion; for the present, 1t may suffice to 
state that the fragments consist largely of grey or white quartz 
and metamorphic quartzite ; variously tinted felsites, bearing 
much resemblance to rocks in the Herefordshire Beacon which 
have been regarded as rhyolites; and reddish binary granites and 
granophyres; as also of minerals which may have been derived 
from such rocks. 
It may be remarked that while all the varieties of quartzite or 
conglomerate found in the different localities can be more or less 
closely paralleled in the chief outcrop at the northern end of 
Quart. Journ. Geol. Soc. vol. lv (1899) fig. 14, p. 146. 
