Geology for general readers1870 |
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Page 24
... bituminous ( coaly ) , ferruginous ( iron- impregnated ) , and other similar compounds ; but whether these rocks be sedimentary sandstones , grits , conglomerates , shales , limestones , and ironstones , or fire - formed lavas ...
... bituminous ( coaly ) , ferruginous ( iron- impregnated ) , and other similar compounds ; but whether these rocks be sedimentary sandstones , grits , conglomerates , shales , limestones , and ironstones , or fire - formed lavas ...
Page 72
... converted into sandstone , and the sandstone , by further change , into quartzite ; the peat be changed into lignite , the lignite into coal , and the bituminous coal into a hard 72 TRANSFORMATIONS OF ROCK - MATTER .
... converted into sandstone , and the sandstone , by further change , into quartzite ; the peat be changed into lignite , the lignite into coal , and the bituminous coal into a hard 72 TRANSFORMATIONS OF ROCK - MATTER .
Page 73
... bituminous coals changed into coke - like anthracites . We every day witness the effects of dry heat in our brick- kilns , coke - ovens , glass - houses , and iron - furnaces ; and if the effect of such temporary heat be to melt and ...
... bituminous coals changed into coke - like anthracites . We every day witness the effects of dry heat in our brick- kilns , coke - ovens , glass - houses , and iron - furnaces ; and if the effect of such temporary heat be to melt and ...
Page 80
... bituminous coal into a hard and flameless anthracite , a porous lava into a close - grained greenstone or basalt , and a greenstone itself , by farther change , into a large - grained crystalline granite . When once the operations of ...
... bituminous coal into a hard and flameless anthracite , a porous lava into a close - grained greenstone or basalt , and a greenstone itself , by farther change , into a large - grained crystalline granite . When once the operations of ...
Page 118
... bituminous or coaly . But in whatever state they may occur the process seems the same — namely , a gradual dissipation , through decay , of the organic atoms , and a gradual substitution , through permeation , of the mineral or ...
... bituminous or coaly . But in whatever state they may occur the process seems the same — namely , a gradual dissipation , through decay , of the organic atoms , and a gradual substitution , through permeation , of the mineral or ...
Common terms and phrases
accumulations ages America ancient antiquity areas arrangement aspects beds bituminous calcareous Cambrian Carboniferous Chalk changes chemical chiefly clays climate coal coal-fields course Cretaceous Crown 8vo crustacea crystalline debris decay deposits distribution of sea drifted dry land earth's crust eocene estuaries Europe existing extinct feet fishes flora and fauna formations forms fossils Geography geologists geology glacial epoch glacier globe gradually gravel heat higher igneous incessant ironstones islands lakes latitudes Laurentian lava less lignites limestones lower mammals masses matter MESOZOIC metamorphism mineral miocene nature newer numerous occur ocean Old Red Sandstone older Oolite operations organic PALEOZOIC partly period physical plants and animals pliocene portion present recent regions reptiles rivers rock-matter rocks rocky sand schists sea and land secondary sediments shales shell-fish shells silts Silurian Sketch soil species stage stone strata stratified surface terrestrial tertiary thickness tion Triassic variety vegetable veins vital volcano vulcanic zoophytes
Popular passages
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Page 3 - ... this respect the Dictionary is most valuable and thoroughly reliable. As to the etymology of words, it is exhibited in a form that fixes itself upon the memory, the root-words showing the probable origin, of the English words, their primary meaning, and their equivalents in other languages. Much useful information and instruction relative to prefixes, postfixes, abbreviations, and phrases from the Latin, French, and other languages, &c., appropriately follow the Dictionary, which is throughout...