Page:A Treatise on Geology, volume 1.djvu/214

 198 rather the only, complete series of the Permian system in the British islands, is that of the north of England, where alone certain lower members are clearly exhibited. The following synopsis is founded on the views of Professor Sedgwick. ('On Magnesian Limestone', Geological Transactions.)

Magnesian conglomerates border the Staffordshire and Salopian coal fields, and have a lower red sandstone beneath them. At Manchester, the magnesian limestone is somewhat better defined; at Kirkby Stephen, it is represented by a brecciated limestone rock; and at St. Bee's Head is a complicated formation of considerable thickness, in which the calcareous part is an important feature.

The Organic Remains of this system, though not numerous, are exceedingly interesting to the naturalist and geologist, from the strong testimony they offer of the successive changes of the living creation, according to the new circumstances of the land and sea. The fossil