Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 241
... fauna . easily understand that if , from the nature of the bottom , plants and smaller animals cannot flourish on a particular tract , the larger kinds that feed on them will also desert it . Even if organisms live and die in some ...
... fauna . easily understand that if , from the nature of the bottom , plants and smaller animals cannot flourish on a particular tract , the larger kinds that feed on them will also desert it . Even if organisms live and die in some ...
Página 249
... fauna . The flora , however , is exceedingly meagre . It consists almost entirely of sea - weeds , which occur usually in the form of fucoid - like impressions . But , as already remarked in reference to the so - called plants of the ...
... fauna . The flora , however , is exceedingly meagre . It consists almost entirely of sea - weeds , which occur usually in the form of fucoid - like impressions . But , as already remarked in reference to the so - called plants of the ...
Página 254
... an important part in the fauna of the Silurian sea , for upwards of 1300 species of them have been found in Silurian rocks . Among the more frequent genera are Bellerophon ( Fig . 129 ) , Ophileta , Holopea. 254 CHAP . PALEOZOIC PERIODS.
... an important part in the fauna of the Silurian sea , for upwards of 1300 species of them have been found in Silurian rocks . Among the more frequent genera are Bellerophon ( Fig . 129 ) , Ophileta , Holopea. 254 CHAP . PALEOZOIC PERIODS.
Página 260
... fauna had now become increasingly varied . We know that these early woodlands were not without insect life , for neuropterous and orthopterous wings have been preserved in the strata . Some of these remains indicate the exist- ence of ...
... fauna had now become increasingly varied . We know that these early woodlands were not without insect life , for neuropterous and orthopterous wings have been preserved in the strata . Some of these remains indicate the exist- ence of ...
Página 262
... fauna of the Devon- ian rocks . But the rarity of their pres- ence there , compared with their pro- digious abundance in some parts of the Old Red Sandstone , probably serves to show that they were essentially inhabit- ants of the lakes ...
... fauna of the Devon- ian rocks . But the rarity of their pres- ence there , compared with their pro- digious abundance in some parts of the Old Red Sandstone , probably serves to show that they were essentially inhabit- ants of the lakes ...
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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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