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Updated: June 25, 2025
Agassiz. To him, then, we listen, when, after having sounded every note in the wide gamut of Nature, after reading the story of life as it stands written in the long series of records reaching from Cambrian fossils to ovarian germs, after tracing the divine principle of order from the starlike flower at his feet to the flower-like circle of planets which spreads its fiery corolla, in obedience to the same simple law that disposes the leaves of the growing plant, as our eminent mathematician tells us, he relates in simple and reverential accents the highest truths he has learned in traversing God's mighty universe.
Nor should we be justified in assuming that if, for instance, the bed of the Pacific Ocean were now converted into a continent we should there find sedimentary formations, in recognisable condition, older than the Cambrian strata, supposing such to have been formerly deposited; for it might well happen that strata which had subsided some miles nearer to the centre of the earth, and which had been pressed on by an enormous weight of superincumbent water, might have undergone far more metamorphic action than strata which have always remained nearer to the surface.
Strips of Cambrian formations occupy troughs in the pre-Cambrian rocks of New England and the maritime provinces of Canada; a long belt borders on the west the crystalline rocks of the Blue Ridge; and on the opposite side of the continent the Cambrian reappears in the mountains of the Great Basin and the Canadian Rockies.
As all the living forms of life are the lineal descendants of those which lived long before the Cambrian 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 great length.
How distinctly it looked like a new day in creation where the horizontal, yellowish-gray beds of the Cambrian were laid down upon the dark, amorphous, and twisted older granite! How carefully the level strata had been fitted to the shapeless mass beneath it! It all looked like the work of a master mason; apparently you could put the point of your knife where one ended and the other began.
One of her daughters, Angharad, married David de Barri, the father of Giraldus and Robert de Barri; another, named after herself, married Bernard of Newmarch, and became the father of the Fitz-Bernard, who accompanied Henry II. In the second and third generations this fruitful Cambrian vine, grafted on the Norman stock, had branched out into the great families of the Carews, Gerards, Fitzwilliams, and Fitzroys, of England and Wales, and the Geraldines, Graces, Fitz-Henries, and Fitz-Maurices, of Ireland.
Of the higher, free-moving classes of the echinoderms, starfish are more numerous than in the Cambrian, and sea urchins make their appearance in rare archaic forms. CRUSTACEANS. Trilobites now reach their greatest development and more than eleven hundred species have been described from the rocks of this period.
This Etage C or primordial zone proved afterwards to be the equivalent of those subdivisions of the Cambrian groups which have been above described under the names of Menevian and Lingula Flags. The second fauna tallies with Murchison's Lower Silurian, as originally defined by him when no fossils had been discovered below the Stiper-Stones.
Torell's discovery of Eophyton Linnæanum, a supposed land plant allied to the rushes and grasses of our day, in certain Swedish rocks of Lower Cambrian age. The writer has, through the kindness of Prof. Torell, seen specimens of these plants in the Museum of the Geological Survey at Stockholm. Mr. They are described and figured by Mr.
The primordial period falls into three subordinate sections the Laurentian, Huronian, and Cambrian, corresponding to the three chief groups of rocks that comprise the archaic formation. The immense period during which these rocks were forming in the primitive ocean probably comprises more than 50,000,000 years.
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