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More "Silurian" Quotes from Famous Books
 ... one other geological term, bequeathed to us by a great authority, and which cannot be changed for the better: I mean that of Geological Horizon, applied by Humboldt to the whole extent of any one geological division,—as, for instance, the Silurian horizon, including the whole extent of the Silurian epoch. It indicates one level in time, as the horizon which limits our view indicates the farthest extension of the plain on which we ...
— Atlantic Monthly, Vol. XII. July, 1863, No. LXIX. - A Magazine Of Literature, Art, And Politics • Various
... the name applied to series of stratified fossiliferous and igneous rocks that were formed during the Devonian period, that is, in the interval of time between the close of the Silurian period and the beginning of the Carboniferous; it includes the marine Devonian and an estuarine Old Red Sandstone series of strata. The name "Devonian" was introduced in 1829 by Sir R. Murchison and A. Sedgwick to describe ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various
... in which are imbedded angular fragments of older strata, possibly sandstone, converted into schist, which, though carried along in the molten mass, still retain impressions of plants of a low order, probably the lowest—Silurian—and distinct ripple marks and raindrops in which no animal markings have yet been observed. The fewness of the organic remains observed is owing to the fact that here no quarries are worked, no roads are made, and as we advance north the rank vegetation ...
— The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873 • David Livingstone
... Finland, and the northwest of the British area, and to have extended thence through boreal and arctic latitudes into North America. Of the height and mass of this primeval land some idea may be formed by considering the enormous bulk of the material derived from its disintegration. In the Silurian formations of the British Islands alone there is a mass of rock, worn from the land, which would form a mountain-chain extending from Marseilles to the North Cape (1800 miles), with a mean breadth of over thirty-three miles, and an ...
— The Antediluvian World • Ignatius Donnelly
... "greensands" of the geologist were largely made up of casts of a similar character, and proved the existence of Foraminifera at a very ancient geological epoch, by discovering such casts in a greensand of Lower Silurian age, which occurs near ...
— Discourses - Biological and Geological Essays • Thomas H. Huxley
... profit, the evenings of several Saturdays. I formed, at this time, my first acquaintance with the Palaeozoic shells, as they occur in the rock—an acquaintance which has since been extended in some measure through the Silurian deposits, Upper and Lower; and these shells, though marked, in the immensely extended ages of the division to which they belong, by specific, and even generic variety, I have found exhibiting throughout a unique family type or pattern, ...
— My Schools and Schoolmasters - or The Story of my Education. • Hugh Miller
... structure than in any of the forms we have hitherto considered. Forms closely related to it occur among the earliest remains of vertebrata that are to be found in the geological record. Since the immeasurably remote Silurian period, sharks and dog-fish have probably remained without any essential changes of condition, and consequently without any essential changes of structure, down to the present day. Then, as now, they dominated the seas. They probably branched off from ...
— Text Book of Biology, Part 1: Vertebrata • H. G. Wells
... part of its range in Kentucky and Indiana, is due in a great measure to this cause, together with the solvent and eroding effects of water charged with carbonic acid. The 'rock-houses' frequently encountered both in this formation and in the limestones of Silurian date, are produced by similar causes; the more easily disintegrated beds gradually crumbling away, while the more durable remain in overhanging ledges. By the oxidation of other elements, sulphates of oxide of iron and alkalies result, which, by double decomposition, ...
— Cave Regions of the Ozarks and Black Hills • Luella Agnes Owen
... Shackleton also found in lat. 85deg. 15' S. beds of limestone, which he regards as underlying and being older than the sandstone. In the limestone, which is also on the whole horizontally bedded, only radiolaria have been found. The limestone is probably of older Palaeozoic age (? Silurian). It is, therefore, tolerably certain that the underlying older formation of gneisses, crystalline schists and granites, etc., is of Archaean age, and belongs ...
— The South Pole, Volumes 1 and 2 • Roald Amundsen
... of this continent, north-west of Minnesota, and known as the Saskatchewan district, is estimated by English authorities to comprise 368,000 square miles. North-west from Otter Tail Lake, the geographical centre of Minnesota, extends a vast silurian formation, bounded on the west along the eastern base of the Rocky Mountains by coal measures. Such a predominance of limestone implies fertility of soil, as in the north-western States, and the speedy colonisation ...
— Handbook to the new Gold-fields • R. M. Ballantyne
... division between Canada and the States was the first American land lifted above the ocean. That land belongs to the Azoic period, and contains no trace of life. Along the base of that range of hills lie the deposits of the next great geological period, the Silurian; and the State of New York, geologically speaking, belongs almost entirely to this Silurian period, with its lowest Taconic division, and the Devonian period, the third in succession of these great epochs. I need hardly remind those of my readers who have travelled through New York, and have visited ...
— The Atlantic Monthly, Vol. IX., March, 1862., No. LIII. - A Magazine Of Literature, Art, And Politics, • Various
... invader. Before the dawn of history, Heaven knows what shadowy Belgae and Iceni enslaved it. But historical time will serve our purpose. The Roman enslaved it, but left Caledonia and Hibernia free, the Cambrian, the Silurian, the Cornishman half-subjugated. The Saxon and Anglian enslaved the east, but scarcely crossed over the watershed of the western ocean. The Dane, in turn, enslaved the Saxon in East Anglia and Yorkshire. The Norman ground ...
— Post-Prandial Philosophy • Grant Allen
... time and space to describe some of the beautiful bacteria and gigantic worms that formerly inhabited the earth. Such an aggregation of actual, living Silurian monsters, any one of which would make a man a fortune to-day, if it could be kept on ice and exhibited for one season only. You could take a full grown mastodon to-day, and with no calliope, no lithographs, no ...
— Remarks • Bill Nye
... attending one of Buckland's lectures—the whole language you hear is geological and philosophic. About a dozen men, with little tables before them, are dispersed over the latter part of the ascent, and keep tempting you with "fossiliferous specimens of the oolite formation," "tertiary," "silurian," "saurian," "stratification," "carboniferous." It was quite wonderful to hear such a stream of learning, and to see, at the same time, the vigour of these terrene philosophers in polishing their specimens upon a whetstone, laid upon their ...
— Blackwood's Edinburgh Magazine, Vol 58, No. 357, July 1845 • Various
... United States revenue stamps were printed on a paper which had a few bits of silk fibre scattered through it. The paper called granite or silurian has a quantity of colored threads mixed with the pulp. In Switzerland blue and red threads were used, giving the paper a slightly grayish tone. In Servia only red threads were used but in sufficient quantity to make the paper ...
— What Philately Teaches • John N. Luff
... geologist under such circumstances would have studied the nature of the rocks that we were passing. I am sure I did trouble my head about them. Pliocene, miocene, eocene, cretaceous, jurassic, triassic, permian, carboniferous, devonian, silurian, or primitive was all one to me. But the Professor, no doubt, was pursuing his observations or taking notes, for in one of our halts he said ...
— A Journey to the Interior of the Earth • Jules Verne
... anatomy; men skinned and galvanized, not men alive and in action. In the same way in landscape, do you think Turner would have painted the strata in an old quarry, or done Ben Cruachan more to the quick, had he known all about geology, gneiss, and graywacke, and the Silurian system? Turner might have been what is called a better-informed man, but we question if he would have been so good, not to say a better representer of the wonderful works of God, which were painted on his retina, and in his inner chamber—the true Camera lucida, the chamber of imagery ...
— Spare Hours • John Brown
... covered by a sheet of Old Red Sandstone (Fig. 64), but, just to the north-east of the position laid down for the originating fault (indicated by the straight broken line), is the well-known Woolhope anticlinal, by which Silurian beds are brought to the surface. The anticlinal axis runs approximately north-west and south-east, and is thus roughly parallel to the earthquake-fault. Moreover, the thinning-out and occasional disappearance of some of the ...
— A Study of Recent Earthquakes • Charles Davison
... problems that it presents one might mention the petrological questions connected with the intrusion of the great masses of granite, and their relation to the slates and associated metamorphic rocks. Of fossiliferous systems there is a fine display of material ranging in age from Silurian to Upper Trias, and additional interest is added by the long-continued volcanic eruptions of the "Panjal trap." Students of recent phenomena have at their disposal interesting problems in physiography, including a grand display of glaciers, and the extensive deposits ...
— The Panjab, North-West Frontier Province, and Kashmir • Sir James McCrone Douie
... of life are the lineal descendants of those which lived long before the Silurian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world. Hence we may look with some confidence to a secure future of equally inappreciable length. And as natural selection works solely by and for the ...
— The Idea of Progress - An Inquiry Into Its Origin And Growth • J. B. Bury
... case just cited, that he has himself in past times been misled by trusting to lithological evidence; yet his reasoning all through Siluria, shows that he still thinks it natural to expect formations of the same age to be chemically similar, even in remote regions. For example, in treating of the Silurian rocks of South Scotland, he says:—"When traversing the tract between Dumfries and Moffat, in 1850, it occurred to me, that the dull reddish or purple sandstone and schist to the north of the former town, which so resembled the bottom ...
— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer
... an era of fire was followed by an era of water. At first there was ocean everywhere. Then, during the Silurian period, the tops of mountains gradually appeared above the waves, islands emerged, disappeared beneath temporary floods, rose again, were fused to form continents, and finally the earth's geography settled into what we have today. Solid matter had wrested from liquid matter some ...
— 20000 Leagues Under the Seas • Jules Verne
... continued to trot out the members of his marital stud for discussion of their points with his more humble fellow-polygamist of the hammer; but when I happened to touch upon the earliest Mrs. Heber, whom I naturally thought he would by this time regard as a forgotten fossil in the Lower Silurian strata of his connubial life, and referred to the interview I had enjoyed with her on the afternoon before entering the city, his whole manner changed to a proper husbandly dignity, and, without seeking corroboration from ...
— The Atlantic Monthly, Vol. 13, No. 78, April, 1864 • Various
... borne out by later experience. He says:—"While, however, there are not apparent signs of mechanical disturbances, during the long period that elapsed from the cooling of the earth's surface to the deposition of the Silurian and Cambrian systems, it is to be presumed that the internal igneous activity of the earth's crust was in full force, so that on the inner side of it, in obedience to the laws of specific gravity, ...
— Getting Gold • J. C. F. Johnson
... a place called absurdly enough Paris, from the quantity of gypsum with which the neighbourhood abounds; and fine specimens of silurian fossils of the trilobite family and of madrepores, millepores, and corallics, are found here. Love's Hotel is the best in the village, and a good ...
— Canada and the Canadians, Vol. 2 • Richard Henry Bonnycastle
... in New York from early times to the present. Here you will see a beautiful panorama of what it looked like two hundred million years ago right where we are sitting and standing now when the seas overlay the area during the Devonian and Silurian times. We have reconstructed the little sea creatures that lived in the rocks in their ...
— Northern Nut Growers Association Report of the Proceedings at the 44th Annual Meeting • Various
... Lyell briefly refers to Barrande's Bohemian work in a letter (August 31st, 1856) to Fleming ("Life of Sir Charles Lyell," II., page 225): "He explained to me on the spot his remarkable discovery of a 'colony' of Upper Silurian fossils, 3,400 feet deep, in the midst of the Lower Silurian group. This has made a great noise, but I think I can explain away the supposed anomaly by, etc." (See Letter 40, Note.) and his agreement with E. de Beaumont's lines of Elevation, or such men as Forbes with his Polarity (41/4. Edward ...
— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin
... spared that ordeal by the Silurian liner Caradoc. Arrayed in borrowed clothes they were notified of a second rescue and came out on deck in time to behold in the dusk of evening the "pirate." He was relating to an admiring throng how he had stuck by the burning ship till it exploded. He had actually been blown into the air and had ...
— The Perils of Pauline • Charles Goddard
... crystal forms. Below this Devonian limestone, its crystals sparkling in the sunshine, with its coral fossils, its fragments of crinoids, and its broken shells of brachiopods, down through the Devonian, the Silurian, the Ordovician, and the Cambrian rocks, down to the original crust formed when first the earth began to cool, if any there be remaining; all these miles of rocks are inorganic, built up of crystals. But here on the surface, the tender green mosses and the bright ...
— Some Winter Days in Iowa • Frederick John Lazell
... last years of his life, and to which he himself attached the greatest importance. In Wales he took up the question of the age of the rocks in the neighbourhood of Dolgelly, and after much study of their fossils proposed the now accepted classification of the Lingula flags of the Lower Silurian system into the Maenturog flags and slates, the Festiniog flags, and the Dolgelly slates. The collecting of lepidoptera was his chief amusement in Brazil, where he made his first acquaintance with the teeming life of the torrid ...
— The Naturalist in Nicaragua • Thomas Belt
... between the most ancient and the Cenozoic, or recent forms of life. The periods are lesser divisions of the eras. In the Proterozoic, there are two periods, viz.: the Archaean and the Algonkian. The Paleozoic has six periods, viz.: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. The Mesozoic era has three periods, the Triassic, Jurassic and Cretaceous, while the Cenozoic era names five periods,—the Eocene, Oligocene, Miocene, Pliocene ...
— The Grand Canyon of Arizona: How to See It, • George Wharton James
... first part of my lecture, a succinct view of the origin, rise, and growth of the globe on which, as the poet has justly said, 'we dwell.' I have shown you—corroborating Scripture—the earth, without form and void, the awful monsters of the Silurian age, and Man in ...
— Five Hundred Dollars - First published in the "Century Magazine" • Heman White Chaplin
... class must be vastly older than the first record of its appearance upon the surface of the globe. But if considerations of this kind compel us to place the origin of vertebrated animals at a period sufficiently distant from the Upper Silurian, in which the first Elasmobranchs and Ganoids occur, to allow of the evolution of such fishes as these from a Vertebrate as simple as the Amphioxus, I can only repeat that it is appalling to speculate upon the extent to which that origin must have preceded the epoch of the first ...
— Critiques and Addresses • Thomas Henry Huxley
... down to 600 or 800 feet above the sea, while in Snowdon it dislikes growing lower than 2000 feet, and is not plentiful even there?—it will reply—Because in the Craven I can get as much carbonic acid as I want from the decomposing limestone: while on the Snowdon Silurian I get very little; and I have to make it up by clinging to the mountain tops, for the sake of the greater rainfall. But if you ask Polopodium calcareum—How is it you choose only to grow on limestone, ...
— Health and Education • Charles Kingsley
... States revenue stamps were printed on a paper which had a few bits of silk fibre scattered through it. The paper called granite or silurian has a quantity of colored threads mixed with the pulp. In Switzerland blue and red threads were used, giving the paper a slightly grayish tone. In Servia only red threads were used but in sufficient quantity to make the paper ...
— What Philately Teaches • John N. Luff
... the maddest geologist under such circumstances would have studied the nature of the rocks that we were passing. I am sure I did trouble my head about them. Pliocene, miocene, eocene, cretaceous, jurassic, triassic, permian, carboniferous, devonian, silurian, or primitive was all one to me. But the Professor, no doubt, was pursuing his observations or taking notes, for in one of our halts he said ...
— A Journey to the Interior of the Earth • Jules Verne
... was to him a new study, and a dark corner of education. As he lay on Wenlock Edge, with the sheep nibbling the grass close about him as they or their betters had nibbled the grass — or whatever there was to nibble — in the Silurian kingdom of Pteraspis, he seemed to have fallen on an evolution far more wonderful than that of fishes. He did not like it; he could not account for it; and he determined to stop it. Never since the days of his Limulus ancestry had any of his ascendants thought thus. Their modes ...
— The Education of Henry Adams • Henry Adams
... the geological structure of the Cheviots belong to the Silurian, Old Red Sandstone and Carboniferous systems. The oldest strata, which are of Upper Silurian age, form inliers that have been exposed by the denudation of the younger palaeozoic rocks. One of these which occurs high up on the slopes of the Cheviots ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various
... The elderly male fossil of the Silurian age,—the age of mollusks,—whose habitat is some still-water club, or public reading-room, where he babbles of the morning's news, is a thousand times more tiresome than any loquacious elderly lady. We excel in this as in everything. We beat you ...
— The Atlantic Monthly, Volume 18, No. 108, October, 1866 • Various
... fauna of mixed mesozoic and palaeozoic types, in rocks of an epoch once supposed to be eminently poor in life; witness, lastly, the incessant disputes as to whether a given stratum shall be reckoned devonian or carboniferous, silurian ...
— Darwiniana • Thomas Henry Huxley
... by trusting to lithological evidence; yet his reasoning all through Siluria, shows that he still thinks it natural to expect formations of the same age to be chemically similar, even in remote regions. For example, in treating of the Silurian rocks of South Scotland, he says:—"When traversing the tract between Dumfries and Moffat, in 1850, it occurred to me, that the dull reddish or purple sandstone and schist to the north of the former town, which so resembled ...
— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer
... or thereabouts, of the Age of the Amphibians, when the coal plants grew, and the Age of the Fishes. And finally, beyond all exact human calculation, but estimated at some five million, we reach the Age of Invertebrates in the Silurian, and in the lowest of these rocks we find beautifully preserved fossils of Bryozoans, to all appearances as perfect in detail of structure as these which we have before us to-day in this twentieth century of man's ...
— The Log of the Sun - A Chronicle of Nature's Year • William Beebe
... without profit, the evenings of several Saturdays. I formed, at this time, my first acquaintance with the Palaeozoic shells, as they occur in the rock—an acquaintance which has since been extended in some measure through the Silurian deposits, Upper and Lower; and these shells, though marked, in the immensely extended ages of the division to which they belong, by specific, and even generic variety, I have found exhibiting throughout a unique family type or pattern, as entirely different ...
— My Schools and Schoolmasters - or The Story of my Education. • Hugh Miller
... hunting, another will find his interest in the effects of structure in scenery, and a third, with more imagination, will give his whole mind to the reconstruction of the past, and will pore over maps of Pleistocene Europe and pictures of Silurian landscape with the keenest appreciation. Each will be bored, or at least not greatly interested, by what attracts the others. Let the children have an easily accessible library—that is the crying ...
— Mankind in the Making • H. G. Wells
... our possible knowledge of the early world and its inhabitants, we must compare, not the area of the whole field of our geological researches with the earth's surface, but the area of the examined portion of each formation separately with the whole earth. For example, during the Silurian period all the earth was Silurian, and animals were living and dying, and depositing their remains more or less over the whole area of the globe, and they were probably (the species at least) nearly as varied in different latitudes and longitudes as at ...
— Contributions to the Theory of Natural Selection - A Series of Essays • Alfred Russel Wallace
... of rocks, we find the traces of life become more abundant, the number of species extended, and important additions made in certain vestiges of fuci, or sea-plants, and of fishes. This group of rocks has been called by English geologists, the Silurian System, because largely developed at the surface of a district of western England, formerly occupied by a people whom the Roman historians call Silures. It is a series of sandstones, limestones, and beds of shale (hardened mud), which are ...
— Vestiges of the Natural History of Creation • Robert Chambers
... in the road was a typical native of the district?" said Senator Hoar. "He was dark and swarthy, with very black hair and piercing eyes; not at all like the majority of people we see in Gloucester for instance." "Yes, he is a typical Forester"; exactly such a man as Tacitus describes his Silurian ancestors; so Spanish in appearance that he tries to account for it by remarking that "that part of Britain lies over against Spain"; as if it was such a short run across the Bay of Biscay to the upper end of the Bristol Channel that nothing would be more natural ...
— Autobiography of Seventy Years, Vol. 1-2 • George Hoar
... such remarkable features in the geology of other countries are almost unknown in Ceylon; and the "clay-slate, Silurian, old red sandstone, carboniferous, new red sandstone, oolitic, and cretaceous systems" have not as yet been recognised in any part of the island.[1] Crystalline limestone in some places overlies the gneiss, and is worked for oeconomical ...
— Ceylon; an Account of the Island Physical, Historical, and • James Emerson Tennent
... were expressed in such endless variety that the Animal Kingdom seems to have been as full then as it is to-day. The Class of the Echinoderms is one of the most remarkable instances of this. In the Silurian period, the Crinoids stood alone; there were neither Ophiurans, Asteroids, Echinoids, nor Holothurians; and yet in one single locality, Lockport, in the State of New York, over an area of not more than a few square miles, where the Silurian deposits have been carefully examined, there have ...
— Atlantic Monthly, Vol. 10, No. 57, July, 1862 - A Magazine Of Literature, Art, And Politics • Various
... formations, though there only as anthracite or graphite—the last two groups of residual products. Of these we have examples in the beds of graphite in the Laurentian rocks of Canada, and of anthracite of the lower Silurian strata of Upper Church ...
— Scientific American Supplement, No. 362, December 9, 1882 • Various
... more about missing links than what I have said. I should rely much on pre-Silurian times; but then comes Sir W. Thomson like an odious spectre. ...
— Alfred Russel Wallace: Letters and Reminiscences, Vol. 1 (of 2) • James Marchant
... explored portions of that continent as far down as the azoic rocks, and made many important discoveries as to the past life of the globe. His researches have been especially rich in the Cambrian or Lower Silurian epochs, and have led to many modifications in the classification of the various forms of life pervading those earlier periods, and we may say that the facts he has brought to light tend strongly to show the correctness of our theory as taken from ...
— Life: Its True Genesis • R. W. Wright
... found, and goes thither to take it, he is not wandering. Moreover, I have no thought of removing myself or my goods from Prague. I live here. It is a city for old men. It is saturnine. The foundations of its houses rest on the silurian formation, which is more than can be said for any other capital, as ...
— The Witch of Prague • F. Marion Crawford
... felspathic porphyry and ashes. The same formation occurs just within the county border at Cerrig-y-Druidion, Langum, Bettys-y-coed and in the Fairy Glen. Northwards from the Ceiriog to the limestone fringe at Llandrillo the Wenlock shale of the Silurian covers the entire mass of the Hiraethog and Clwydian hills, but verging on its western slopes into the Denbighshire grit, which may be traced southward in a continuous line from the mouth of the Conway as far as Llanddewi Ystrad Enni in Radnorshire, ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 - "Demijohn" to "Destructor" • Various
... offer many opportunities for the development of stone quarries, but such stone as is extensively used was displayed. The limestones of the Silurian series are the principal sources of supply, the quarries about Joliet being among the largest in the United States. The limestone is generally used in the form of rubble or ...
— Final Report of the Louisiana Purchase Exposition Commission • Louisiana Purchase Exposition Commission
... fishes of to-day. Suddenly, in the "carbonic age" amphibia and reptiles appear, and then come, in the "Triassic" the huge reptiles known as dinosaurs. Insects and scorpions have been found in the "Silurian." [tr. note: sic on punctuation] They stand among the highest of even living articulates, and they are the "oldest" known airbreathing animals. "We seek in vain for the progenitors of these highly organized articulates or for some conceivable method by which ...
— Evolution - An Investigation and a Critique • Theodore Graebner
... of the same kind may be found in every sub-kingdom. The 'Globigerina' of the Atlantic soundings is identical with that which occurs in the chalk; and the casts of lower silurian 'Foraminifera', which Ehrenberg has recently described, seem to indicate the existence at that remote period of forms singularly like those which now exist. Among the corals, the palaeozoic 'Tabulata' are constructed on precisely ...
— Lectures and Essays • T.H. Huxley
... second trip on a different line from that town to the village of Holmfirth, introduced us to a region of softly-rounded hills and winding valleys, precisely resembling those of the Southern Highlands of Scotland, as might indeed be expected from the identity of the formation (Silurian), but which had this peculiar feature in addition, that every here and there was a little cloth-making village, taking advantage of the abundant water-power derived from the mountain-slopes. The swelling heights were brown and bare, like those of Tweeddale; and ...
— Chambers's Edinburgh Journal, No. 440 - Volume 17, New Series, June 5, 1852 • Various
... living forms of life are the lineal descendants of those which lived long before the Silurian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world. Hence we may look with some confidence to a secure future of equally inappreciable ...
— The Idea of Progress - An Inquiry Into Its Origin And Growth • J. B. Bury
... fastidious wonder-seeker. The entrance was about the size of an ordinary doorway, flanked by twin boulders like columns for an arched shelter. Within was a large room with fairly smooth walls and ceiling of Silurian rock ...
— Campfire Girls in the Allegheny Mountains - or, A Christmas Success against Odds • Stella M. Francis
... life need not have evolved at all, or might have evolved only in very restricted limits, if it had chosen the alternative, much more convenient to itself, of becoming anchylosed in its primitive forms. Certain Foraminifera have not varied since the Silurian epoch. Unmoved witnesses of the innumerable revolutions that have upheaved our planet, the Lingulae are to-day what they were at the remotest times ...
— Creative Evolution • Henri Bergson
... had time and space to describe some of the beautiful bacteria and gigantic worms that formerly inhabited the earth. Such an aggregation of actual, living Silurian monsters, any one of which would make a man a fortune to-day, if it could be kept on ice and exhibited for one season only. You could take a full grown mastodon to-day, and with no calliope, no lithographs, ...
— Remarks • Bill Nye
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