Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 14
... acid , it dissolves and removes some of the more soluble ingredients in the form of carbonates , thereby also usually loosen- ing the component particles of the stone . In general , the influence of rain is to cause the exposed parts of ...
... acid , it dissolves and removes some of the more soluble ingredients in the form of carbonates , thereby also usually loosen- ing the component particles of the stone . In general , the influence of rain is to cause the exposed parts of ...
Página 16
... acids ready to be absorbed by percolating rain - water , the power of which to decompose rocks is thereby increased ( p . 24 ) . It is obvious , then , that in answer to the question , What becomes of the rotted material produced by ...
... acids ready to be absorbed by percolating rain - water , the power of which to decompose rocks is thereby increased ( p . 24 ) . It is obvious , then , that in answer to the question , What becomes of the rotted material produced by ...
Página 24
... acid which it thus obtains it proceeds to corrode the surfaces of rock on which it falls . When it reaches the ground and absorbs the acids termed " humous , " which are supplied by the decomposing vegetation of the soil , it acquires ...
... acid which it thus obtains it proceeds to corrode the surfaces of rock on which it falls . When it reaches the ground and absorbs the acids termed " humous , " which are supplied by the decomposing vegetation of the soil , it acquires ...
Página 47
... acids or carbonic acid . In this condition , it is liable to be oxidised on exposure . As after oxidation it can no longer be retained in solution , it is precipitated to the bottom where it collects in grains which by successive ...
... acids or carbonic acid . In this condition , it is liable to be oxidised on exposure . As after oxidation it can no longer be retained in solution , it is precipitated to the bottom where it collects in grains which by successive ...
Página 52
... acid out of the air in its descent , and abstracting organic acids and carbonic acid from the soil through which it sinks . By help of these in- gredients , it is enabled to attack even the most durable rocks , and to carry some of ...
... acid out of the air in its descent , and abstracting organic acids and carbonic acid from the soil through which it sinks . By help of these in- gredients , it is enabled to attack even the most durable rocks , and to carry some of ...
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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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