The Ancient Life-history of the Earth: A Comprehensive Outline of the Principles and Leading Facts of Palæontological ScienceD. Appleton & Company, 1878 - 407 páginas |
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Página x
... - Echinoderms - Annelides - Crustaceans - Structure of Trilobites - Brachiopods - Pteropods , Gasteropods , and Bivalves - Cephalo- pods - Literature , 77-90 CHAPTER IX . The Lower Silurian period - The Silurian X CONTENTS .
... - Echinoderms - Annelides - Crustaceans - Structure of Trilobites - Brachiopods - Pteropods , Gasteropods , and Bivalves - Cephalo- pods - Literature , 77-90 CHAPTER IX . The Lower Silurian period - The Silurian X CONTENTS .
Página xi
... Silurian period - The Silurian rocks generally - Limits of Lower and Upper Silurian - General succession , subdivisions , and characters of the Lower Silurian rocks of Wales - General succes- sion , subdivisions , and characters of the ...
... Silurian period - The Silurian rocks generally - Limits of Lower and Upper Silurian - General succession , subdivisions , and characters of the Lower Silurian rocks of Wales - General succes- sion , subdivisions , and characters of the ...
Página xv
... Silurian lime- stone , 13. Microscopic section of oolitic limestone , Ju- rassic , 14. Microscopic section of ... Silurian rocks of Wales , 30 35. Generalised section of the Lower Silurian rocks 33 * w w ∞ of North America , 36 ...
... Silurian lime- stone , 13. Microscopic section of oolitic limestone , Ju- rassic , 14. Microscopic section of ... Silurian rocks of Wales , 30 35. Generalised section of the Lower Silurian rocks 33 * w w ∞ of North America , 36 ...
Página xvi
... Silurian Brachiopods , 109 88. Group of Devonian Tri- lobites , 144 51. Group of Lower Silurian Brachiopods , 89. Wing of Platephemera IIO antiqua , 145 52. Murchisonia gracilis , III 53. Bellerophon argo , 54. Maclurea crenulata , III ...
... Silurian Brachiopods , 109 88. Group of Devonian Tri- lobites , 144 51. Group of Lower Silurian Brachiopods , 89. Wing of Platephemera IIO antiqua , 145 52. Murchisonia gracilis , III 53. Bellerophon argo , 54. Maclurea crenulata , III ...
Página 19
... water . Fig . 6. - Microscopic section of a calcare- ous breccia in the Lower Silurian ( Coniston Limestone ) of Shap Wells , Westmoreland . Fig . 10. - Piece of Nummulitic Limestone from the. THE FOSSILIFEROUS ROCKS . 19.
... water . Fig . 6. - Microscopic section of a calcare- ous breccia in the Lower Silurian ( Coniston Limestone ) of Shap Wells , Westmoreland . Fig . 10. - Piece of Nummulitic Limestone from the. THE FOSSILIFEROUS ROCKS . 19.
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abundant allied Amongst ancient animals attain beds belong Birds Bivalves bones bony Brachiopods Britain calcareous Cambrian carbonate Carboniferous Chalk characteristic clays coal Coal-measures composed consists contain Corals Cretaceous Crinoids Crustaceans Cycads deposits Devonian Elephants Eocene Europe existing species extinct genus feet fishes Foraminifera formation forms fossils Ganoids genera genus Geol geological gigantic Glacial Graptolites Greensand horny Journ Jurassic known Lastly Laurentian less Lias lime limestones living Lower Silurian Mammals marine Mesozoic Miocene Mollusca natural North America numerous occur Old Red Sandstone Oolitic organic origin Owen Palæontographical Society Paleozoic period Permian plants plates Pliocene portion possessed Post-Pliocene present day principal Pterosaurs Quadrupeds regarded represented Reptiles resembling Rhinoceros rocks sands shales shell singular siphuncle skeleton skull Slates strata structure surface tail teeth Tertiary thickness tion tooth Trias Triassic Trilobites types Univalves Upper Miocene Upper Silurian vertebræ whilst yielded the remains
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Página 363 - Eagles, owls, and gulls pursue their prey along the sea-coast; ptarmigan run in troops amongst the bushes; little snipes are busy along the brooks, and in the morasses; the social crows seek the neighbourhood of men's habitations ; and, when the sun shines in spring, one may even sometimes hear the cheerful note of the finch, and in autumn, that of the thrush...
Página 291 - ... formation occupies a middle place in the Eocene series, we are struck with the comparatively modern date to which some of the greatest revolutions in the physical geography of Europe, Asia, and northern Africa must be referred. All the mountain chains, such as the Alps, Pyrenees, Carpathians, and Himalayas, into the composition of whose central and loftiest parts the nummulitic strata enter bodily, could have had no existence till after the middle Eocene period."— Manual, p. 232. A still more...