472
R. HARKNESS AND H. A. NICHOLSON ON THE STRATA BETWEEN
Fig. 3.—Diagram showing the vertical Succession of the Silurian Strata in Skelgill Beck, near Ambleside.
|
Base of the Coniston Flags (Broughton-Moor Flags), with Monograptus colonus, Retiolites Geinitzianus, &c. |
| Knock beds. Greenish slates with dendrites, casts of a small Orthis, &c. | |
| Graptolitic Mudstones, with numerous Graptolites and other fossils. At a is the lowest Graptolitic band resting directly upon the limestone; and immediately above it (b) is a grey band full of Brachiopods. | |
| Coniston Limestome proper, consisting of shales alternating with bands of limestone and layers of calcareous concretions. The shales are highly fossiliferous. | |
| Summit of the Borrowdale series, c is a thin band of ashes representing the Style-End Grassing beds. It is full of spots of peroxide of iron and rusty cavities, apparently due to the decomposition of fossils. |
