The Quarterly journal of the Geological Society of London . cies. It hasround marks regularly arranged, but flat, and without depressedareolae, as represented in fig. 13, ms. That growth on occasionallv* Found in 1853. 1853.] DAWSON COAL-MEASU RES, NOVA SCOTIA. 23 inundated mud and sand was quite natural to the trees with Stigmarianroots, is shown not only by instances in this section, but by a veryremarkable bed at Port Hood, Cape Breton, which I may refer tohere as belonging to precisely the same class of facts with that nowunder consideration. A bed of sandstone, in the coal formation at Po
The Quarterly journal of the Geological Society of London . cies. It hasround marks regularly arranged, but flat, and without depressedareolae, as represented in fig. 13, ms. That growth on occasionallv* Found in 1853. 1853.] DAWSON COAL-MEASU RES, NOVA SCOTIA. 23 inundated mud and sand was quite natural to the trees with Stigmarianroots, is shown not only by instances in this section, but by a veryremarkable bed at Port Hood, Cape Breton, which I may refer tohere as belonging to precisely the same class of facts with that nowunder consideration. A bed of sandstone, in the coal formation at Port Hood, is filledwith the stumps of large erect ribbed trees, with very distinct Stig-marian roots of two species; and more than one generation of treesmust have grown on the spot, since one large stump was observed tobe penetrated by the root of another tree, which must have grownthrough it after it became filled with sand, fig. 3. Yet several of Fig. 3.—Stump of a tree penetrated by Stigmaria ; from the coal-measures at Port Hood, Cape Breton the layers of this sandstone are ripple-marked; and the sandstoneimmediately underlying one of the large stumps, which had been removed, was found to be distinctlyFig. 4.—Impression of tree- rippled, fig. 4. At Port Hood thestump in sandstone, with rip- beds dip gently toward the sea,pie-marks; from Port Hood. and at low tide a large surface of is of greater interest, showing seven soil-surfaces, intermixed with
Size: 2140px × 1168px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
