. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. DEVONIAN AND OLD RED PERIOD. 17 Generalised Section of the Devonian Rocks of North America. Fig. ooOOoOOOoO V: :\'t';-/'•: ;Trtr"ff^';<' 000 o o O ^» *» o Catskill Group. Chemung Group. Portage Group. Hamilton Group. Corniferous Limestone. Schoharie Grit, Cauda-Galli Grit. Oriskany Sandstone. Lower Helderberg. also yielded traces of many other plants (such as Annularia, Asterophyllites, Cardiocarpon^ &c-)? which acquire a greater pre-
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. DEVONIAN AND OLD RED PERIOD. 17 Generalised Section of the Devonian Rocks of North America. Fig. ooOOoOOOoO V: :\'t';-/'•: ;Trtr"ff^';<' 000 o o O ^» *» o Catskill Group. Chemung Group. Portage Group. Hamilton Group. Corniferous Limestone. Schoharie Grit, Cauda-Galli Grit. Oriskany Sandstone. Lower Helderberg. also yielded traces of many other plants (such as Annularia, Asterophyllites, Cardiocarpon^ &c-)? which acquire a greater pre- dominance in the Carboniferous period, and which will be spoken of in discussing the structure of the plants of the Coal- measures. Upon the whole, the one plant which may be con- sidered as specially characteristic of the Devonian (though not confined to this series) is the Psilophyton (fig. 77) of Dr Daw- son. These singular plants have slender branching stems, with sparse needle-shaped leaves, the young stems being at first coiled up, crosier-fashion, like the young fronds of ferns, whilst the old branches carry numerous spore-cases. The. 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 Nicholson, Henry Alleyne, 1844-1899. New York, A. L. Fowle
Size: 1753px × 1425px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
