A Manual of Elementary Geology / or, The Ancient Changes of the Earth and its Inhabitants as Illustrated by Geological Monuments

by Sir Charles Lyell

Fig. 526. Carboniferous rain-prints with worm-tracks (a, b) on green shale, from Cape Breton, Nova Scotia.

Fig. 527. Casts of rain-prints on a portion of the same slab, No. 526. seen on the under side of an incumbent layer of arenaceous shale.

The arrow represents the direction of the shower.

Fig. 528.

Fig. 528. Casts of carboniferous rain-prints and shrinkage-cracks, (a) on the under side of a layer of sandstone, Cape Breton, Nova Scotia.