A Manual of Palaeontology for the Use of Students: With a General Introduction on the Principles of Palaeontology |
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Page 6
... thickness of any particular set of beds is comparatively small , so that different kinds of rock alternate with one ... thicker or thinner layers or laminæ ; and if there are any beds of pebbles these will all be rounded or smooth , just ...
... thickness of any particular set of beds is comparatively small , so that different kinds of rock alternate with one ... thicker or thinner layers or laminæ ; and if there are any beds of pebbles these will all be rounded or smooth , just ...
Page 10
... thickness of hundreds , or even thousands , of feet of little altered sediments ; and even amongst beds which do contain fossils , we often meet with strata of a few feet or yards in thickness , which are wholly destitute of any traces ...
... thickness of hundreds , or even thousands , of feet of little altered sediments ; and even amongst beds which do contain fossils , we often meet with strata of a few feet or yards in thickness , which are wholly destitute of any traces ...
Page 35
... are continuous . Thus there are scores of instances in which the fauna of a given bed , perhaps but a few inches in thickness , differs altogether from that of the beds immediately IMPERFECTION OF PALEONTOLOGICAL RECORD . 35.
... are continuous . Thus there are scores of instances in which the fauna of a given bed , perhaps but a few inches in thickness , differs altogether from that of the beds immediately IMPERFECTION OF PALEONTOLOGICAL RECORD . 35.
Page 36
... thickness , or " thin out , " as we pass away from the coast in the direction of deep water . On approaching deep water , however , we might find that , though the sandstones were rapidly dying out , the thickness of the entire series ...
... thickness , or " thin out , " as we pass away from the coast in the direction of deep water . On approaching deep water , however , we might find that , though the sandstones were rapidly dying out , the thickness of the entire series ...
Page 37
... thickness , and almost without a single intercalated layer of shale . Passing northwards , some of the beds of limestone begin to thin out , and their place is taken by strata of a different mineral nature , such as sandstone , grit ...
... thickness , and almost without a single intercalated layer of shale . Passing northwards , some of the beds of limestone begin to thin out , and their place is taken by strata of a different mineral nature , such as sandstone , grit ...
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Common terms and phrases
abundant allied amongst anchylosed animal Annelides aperture appear appendages articulated attained beak beds belong Birds Bivalves body bones bony Brachiopods calcareous Cambrian Carboniferous Carboniferous Rocks Cephalopods Chalk characteristic clays commence composed comprising consists Corals Cretaceous Cretaceous period Crinoids Crustaceans Cycads deposits Devonian division dorsal Eocene Eocene Tertiary existing species extinct feet fins fishes Foraminifera formation forms fossils Ganoids genera genus gills Graptolites horny Hydrozoa incisors integument Jurassic known Lastly Laurentian limbs Limestone living lower jaw Lower Silurian Mammals marine Mesozoic Miocene molars Mollusca mouth North America occur Old Red Oolites operculum pair Paleozoic Permian plants plates Pliocene Polyzoa portion possession Post-Pliocene posterior present day Red Sandstone regarded remains represented Reptiles ribs septa shales shell Silurian Rocks single siphuncle sometimes spines strata sub-kingdom sub-order surface tail teeth thickness toes Trias Triassic tube Upper Cambrian Upper Silurian valve ventral Vertebrates whilst Zoantharia