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Published online by Cambridge University Press: 01 May 2009
The total thickness of Millstone Grit in North Wales does not quite reach 300ft. This thickness is, I am aware, considerably below that given by several authors, who notice this formation incidentally; but I am prepared to say, from. actual and computed measurement, made on the spot, that the above figures are substantially correct. The Carboniferous system, from the base of the Mountain Limestone to that of the Coal Measures in North Wales, is but an epitome of the same beds in the North of England, the middle member, the grits and sandstones, being thin in proportion.
page 122 note 1 The “Pockets” (Figs. 4–7, p. 71) occur in one unbroken bed of sandstone, as stated in the text, not in jointed and bedded rock, as represented in the woodcuts.
page 123 note 1 “The Fossiliferous character of the Millstone Grit at Sweeney, near Oswestry, Shropshire,” by W. Prosser, F.G.S., GEOI. MAG., 1865, Vol. II., p. 107.
page 124 note 1 Or, more probably, the grave of the Cephalopoda?—EDIT.
page 125 note 1 Proceedings of the Owestry Field Club.
page 125 note 2 At this date my knowledge of the extent to which the fossils extend upwards in the Grit was limited.
page 126 note 1 “Geology of Yorkshire,” vol ii.