ROCKS OF SHROPSHIRE. 659 
_ The section displays a very clear dip to the N. at 80°. 
About half a mile to the E. of Woodgate, near the farm of Un- 
derhurst, is an exposure of a granitoid rock, not unlike the imper- 
fect granite of Primrose Hill, but containing more chlorite. 
On the W. side of the main axis, where the Cardington promon- 
tory springs from the side of the chain, Longmynd slates (coloured 
“Caradoc” by the Survey) are faulted down against the Precam- 
brian rocks of Helmeth and Hazler Hills. On the east, the spur pro- 
jects into an area of Caradoc Sandstone. Near the village of Car- 
dington, the rocks just described are overlain by bedded quartzite, 
forming the Sharp-Stone ridge, and dipping N. at a high angle with 
a strike of half a mile. The older series and the quartz rock to- 
gether form the promontory, which is surrounded, except at its neck, 
by Caradoc Sandstone with its normal §.W. strike. 
Summary.—A great spur, with an H. and W. strike, projecting 
from the H. side of the main chain at Hazler Hill, composed of 
breccias and grits in the upper part, underlain by massive felstone 
with alternations of altered grit and felstones below, and red gra- 
nitoidite at the base, the whole dipping at a high angle to the N., 
thrusting up quartzite in front, and being surrounded by Caradoe 
Sandstone with its usual S.W. strike. Longmynd slates faulted down 
against the W. flank of the main ridge. 
14. Ragleth Fill. 
Details —This elevation is coloured on the Survey Map as altered 
Caradoc, with a linear mass of “ greenstone ” running about haliway 
along the crest from the N.E. end. This “ greenstone” has no ex- 
istence, the ridge being occupied by a compact greenish-grey clay- 
stone, which also makes up the chief mass of the north-easterly half 
of the mountain. On the $.E. slope, midway between each end, are 
beds of thinly laminated greenish fine-grained slate, very similar to 
ordinary Longmynd slate, and displaying the normal dip (W.N.W.) 
of that formation. This coincidence of dip is apparently due to a 
local pretrusion of a highly altered greenstone which breaks out of 
the side of the hill at this point. The slaty beds are overlain by 
compact reddish felstone. At a little distance to the W., similar 
slate is interstratified with a coarse felspathic grit with a few grains of 
quartz. Towards the south-west end the grit appears with an EK. and 
W. strike, associated with a grey compact claystone (Note 7, p. 668). 
Alternations of slaty and brecciated bands areseen. At the extreme 
§.W. end is a fine-grained grey claystone in thin beds dipping at a 
high angle to the N.N.E. A little to the west of this spot is a knob 
of dolerite, containing much free calcite, and breaking to the surface 
at about the line of fault between the Cambrian and Precambrian 
rocks. ‘This protrusion appears to have produced the deviation in 
the strike of the claystone from the normal EK. and W. direction. 
Caradoe rocks bound the §.H. side with a faulted junction; they 
also lap round the §.W. end, where they dip to the 8. They are 
underlain by a coarse conglomerate with a $.W. dip. This rock is 
