. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Ch. XXIV.] COAL—RAIN-PRINTS. 489 upon our taking a direction higher up or lower down the ancient river or delta deposit. In the strata above described, the association of clays supporting upright trees, with other beds containing brackish-water shells, implies such a repeated change in the same area, from land to sea and from sea to land, that here, if anywhere, we should expect to meet with evidence of the fall of rain on ancient sea-beaches. Accordingly, rain- prin
. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. Ch. XXIV.] COAL—RAIN-PRINTS. 489 upon our taking a direction higher up or lower down the ancient river or delta deposit. In the strata above described, the association of clays supporting upright trees, with other beds containing brackish-water shells, implies such a repeated change in the same area, from land to sea and from sea to land, that here, if anywhere, we should expect to meet with evidence of the fall of rain on ancient sea-beaches. Accordingly, rain- prints were seen by Dr. Dawson and myself at various levels, but the most perfect hitherto observed were discovered by Mr. Brown near Sydney in Cape Breton. They consist of very delicate impressions Fiff. 542. Fiff. Fig. 542. Carboniferous rain-prints •with worm-tracks (a, &) on green shale, from Cape Breton, Nova Scotia, Natural size. Fig. 543. Casts of rain-prints on a portion of the same slab, fig. 542, seen on the under side of an incumbent layer of arenaceous shale. Natural size. The arrow represents the supposed direction of the shower. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lyell, Charles, Sir, 1797-1875. New York, D. Appleton and co.
Size: 2165px × 1154px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1868
