Practical Geology and Mineralogy: With Instructions for the Qualitative Analysis of Minerals |
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abundant acid afford ammonia animals appears argillaceous augite basalt beds blow-pipe calcareous Cambrian carbonate of lime carboniferous limestone carboniferous system chalk characters chlorite clay cleavage coal field coal measures coast colour conglomerates consists containing cretaceous crystalline crystals deposits dikes district earth elevation England epoch exhibit extending extinct feet felspar formation fossiliferous fossils fracture genera geological geologists gneiss granite grauwacke gravel greenstone grit heat Hills hornblende igneous rocks iron island lava lias lower lustre magnesian limestone marine marls masses metallic mica mica schist miles millstone grit mineral Murchison occur old red sandstone oolitic organic remains oxide oxygen planes poikilitic porphyry portion potassa precipitate primary produced Professor Sedgwick quartz sand schist sedimentary shale shells siliceous Silurian slate soda sometimes species specific gravity stone strata stratified rocks structure substances sulphate sulphur sulphuret surface tertiary thickness traces upper veins volcanic Wales wealden
Popular passages
Page 41 - I do not now maintain, I think it right, as one of my last acts before I quit this Chair, thus publicly to read my recantation. We ought, indeed, to have paused before we first adopted the diluvian theory, and referred all our old superficial gravel to the action of the Mosaic flood.
Page 141 - GEOLOGY is the science which investigates the successive changes that have taken place in the organic and inorganic kingdoms of nature ; it enquires into the causes of these changes, and the influence which they have exerted in modifying the surface and external structure of our planet.
Page 1 - geology, in the magnitude and sublimity of the objects of which it treats, undoubtedly ranks, in the scale of the sciences, next to astronomy...
Page 325 - Wash, that great triangular area commences which extends over the eastern and southern counties, bounded on the east and south by the sea, and on the west by a line drawn from Hunstanton Cliffs, in Norfolk, to Abbotsbury, on the coast of Dorsetshire.
Page 38 - After all, it should be recollected,' says Dr. Buckland, ' that the question is not respecting the correctness of the Mosaic narrative, but of our interpretation of it; and still further, it should be borne in mind that the object of this account was, not to state in what manner, but by whom, the world was made.
Page 42 - We ought, indeed, to have paused, before we first adopted the diluvial theory, and referred all our old superficial gravel to the action of the Mosaic flood. For of man, and the works of his hands, we have not yet found a single trace among the remnants of a former world entombed in these ancient deposits.
Page 91 - Weigh the denser body and the compound mass, separately, both in water and out of it ; then find how much each loses in water, by subtracting its weight in water from its weight in air ; and subtract the less of these remainders from the greater. Then say, As the last remainder, Is to the weight of the light body in air, So is the specific gravity of water, To the specific gravity of the body.
Page 293 - In external form these animals somewhat resemble our modern bats and vampires : most of them had the nose elongated, like the snout of a crocodile, and armed with conical teeth. Their eyes were of enormous size, apparently enabling them to fly by night. From their wings projected fingers, terminated by long hooks, like the curved claw on the thumb of the bat. These must have formed a powerful paw, wherewith the animal was enabled to creep or climb, or suspend itself from trees. It...
Page 336 - At the voice of comparative anatomy, every bone, and fragment of a bone, resumed its place. I cannot find words to express the pleasure I experienced In seeing, as I discovered one character, how all the consequences which I predicted from it were successively confirmed...
Page 42 - For of man, and the works of his hands, we have not yet found a single trace among the remnants of a former world entombed in these ancient deposits. In classing together distant unknown formations under one name; in giving them a simultaneous origin, and in determining their date, not by the organic remains we had discovered, but by those we expected hypothetically hereafter to discover, in them ; we have given one more example of the passion with which the mind fastens upon general conclusions,...