Page:A Treatise on Geology, volume 2.djvu/168

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154
A TREATISE ON GEOLOGY.
CHAP. VII.

class III.—Before the Deposition of the lower Green Sands.
Strata disturbed In What manner. Localities Igneous Rocks in connection.
Affecting the oolite rocks generally, but not any part of the cretaceous system A broad axis of elevation Yorkshire (Bishop Wilton) None
Unconformity of dips Bowood None
Blackdown None
Great dyke and fault Yorkshire (Moors near Whitby) (Vol. I. p. 231.) Basaltic dyke from Teesdakle
Complicated effects Skye, Eigg Sienite, hyperstheine and other trap rocks, pitchstone of Eigg
Ord of Caithness (Vol. I. p. 231) Granite
Of doubtful age.—The gentle anticlinal of coralline oolite near Bottisham (Cambridgeshire), which perhaps affects the lower greensand of Ely. no igneous rocks. Professor Sedgwick discovered it.

class IV.—Before the Deposition of the Chalk.
Strata disturbed In What manner. Localities Igneous Rocks in connection.
Affecting, perhaps, all the tertiary strata which occur in the district Anticlinal axes. (See Vol. I p. 276.) Weald of Kent and Sussex None
Isle of Wight None