Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 55
... Calcareous Springs . - Among the accumulations of this nature by far the most frequent and important are those formed by what are called Calcareous Springs . In regions abounding in lime- stone or rocks containing much carbonate of lime ...
... Calcareous Springs . - Among the accumulations of this nature by far the most frequent and important are those formed by what are called Calcareous Springs . In regions abounding in lime- stone or rocks containing much carbonate of lime ...
Página 56
... calcareous water , receive a precipitation of carbonate of lime between their minute pores and crevices , and assume a crystalline structure . Solidifying and hardening by degrees , they end by becoming a compact crystalline stone ...
... calcareous water , receive a precipitation of carbonate of lime between their minute pores and crevices , and assume a crystalline structure . Solidifying and hardening by degrees , they end by becoming a compact crystalline stone ...
Página 57
... Calcareous springs , issuing from limestone or other rock abounding in lime , deposit carbonate of lime as a white pre- cipitate . So large is the proportion of mineral contained by some waters that thick and extensive accumulations of ...
... Calcareous springs , issuing from limestone or other rock abounding in lime , deposit carbonate of lime as a white pre- cipitate . So large is the proportion of mineral contained by some waters that thick and extensive accumulations of ...
Página 60
... calcareous rocks , and openings are made from these passages up to the surface whereby rivers are engulfed . Many of the caves thus hollowed out have served as dens of wild beasts and dwelling - places for man , and the relics of these ...
... calcareous rocks , and openings are made from these passages up to the surface whereby rivers are engulfed . Many of the caves thus hollowed out have served as dens of wild beasts and dwelling - places for man , and the relics of these ...
Página 82
... calcareous sea - weeds . Peat - bogs . In temperate and arctic countries , marshy vege- tation accumulates in peat - bogs over areas from an acre or two to many square miles , and to a depth of sometimes 50 feet . These deposits are ...
... calcareous sea - weeds . Peat - bogs . In temperate and arctic countries , marshy vege- tation accumulates in peat - bogs over areas from an acre or two to many square miles , and to a depth of sometimes 50 feet . These deposits are ...
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Términos y frases comunes
abundant accumulated acid Ammonites ancient Assistant Master beds BOOK bottom Brachiopods calcareous calcite Cambrian Cambridge carbonate of lime Carboniferous Chapter chiefly clay College containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Edited ELEMENTARY Eocene eruptive Europe evidence example extinct fauna Fcap feet fissures fossils genera GEOGRAPHY geological history glacier globe gradually granite gravel GREEK ground Illustrated Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic mineral Miocene mountains natural occur Old Red Sandstone organic remains original Palæozoic Paleozoic period Permian plants and animals Pliocene present preserved Prof Professor quartz Red Sandstone regions revised rivers rocks sand schists sediment sedimentary sedimentary rocks shales sheets shells siliceous Silurian soil solid sometimes species stone strata structure substance surface terrestrial Tertiary thick trace Triassic upper various vegetation volcanic
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