288 
the Main Limestone of Penyghent and Ingleborough. The 
Kinder Grit above it being the Ingleborough Grit of the 
same author. The Yoredale Rocks are extensively quarried 
at Low Harrogate, Shaw Green, and several other places. 
Dipping rapidly in every direction from the slopes of these 
Yoredale Rocks are thick beds of Kinderscout Grit, separated 
into two, and in some cases three beds, by thick masses of 
Shale, the whole being near 1,400 feet in thickness. The 
lowest and the highest Sandstones are thick-bedded, coarse, 
massive Gritstones, frequently containing pebbles of quartz ; 
they are extensively quarried for building purposes near 
Pannal and at Hookstone Wood. Southwards the Upper 
Bed of Grit forms the bold eminence of Great Almias Cliff 
rising to a height of 700 feet above the sea-level. North- 
eastwards they gradually sink and disappear beneath the 
Permian Limestone escarpment at Bilton Park and near 
Starbeck Station. 
We have seen that the lowest member of the Millstone 
Grits in the West Riding forms roughly two sides of a square> 
extending from south to north and west to east, and owing 
its present position to the elevating influence of the Pennine 
and Craven systems of Anticlinals. The Rocks have a general 
dip towards the centre of the square, and above them, rising 
to still greater eminence, are the members of the Third Grit 
Group. Like the Fourth or Kinder Grit, they present a bold 
escarped face to the westwards, whilst towards the east they 
sink gradually with a dip-slope under the superincumbent 
beds of the series. They rise frequently to the height of 
1,700 to 1,800 feet, and usually form moorlands covered with 
heather and peat bogs. The hills composed of these rocks 
extend northwards from Holme Moss, on the south-west 
border of the county ; Marsden, Rishworth, Wadsworth, and 
Keighley Moors being amongst the number. From Keighley, 
Rumblesmoor, Otley Chevin, and Arthington Bank, the series 
