Class-book of GeologyMacmillan, 1896 - 404 páginas |
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Resultados 6-10 de 71
Página 46
... the growing mass of marl . Many examples of these marl - deposits are to be found. FIG . 17. - Piece of shell - marl containing shells of Limnæa peregra . FIG . 18. View of Axmouth landslip ( as it. 46 CHAP . RECORDS OF LAKES.
... the growing mass of marl . Many examples of these marl - deposits are to be found. FIG . 17. - Piece of shell - marl containing shells of Limnæa peregra . FIG . 18. View of Axmouth landslip ( as it. 46 CHAP . RECORDS OF LAKES.
Página 47
... containing organic 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 ...
... containing organic 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 ...
Página 48
... contain sodium - carbonate , in others magnesium - chloride is abundant . The Dead Sea , the Great Salt Lake of Utah , and many other salt lakes and inland seas furnish interesting evidence of the way in which they have gradually ...
... contain sodium - carbonate , in others magnesium - chloride is abundant . The Dead Sea , the Great Salt Lake of Utah , and many other salt lakes and inland seas furnish interesting evidence of the way in which they have gradually ...
Página 50
... containing not less than 30 acres of arable land , sank down with all its fields , hedgerows , and path- ways . This sunken mass , where it broke away from the upland , left behind it a new cliff , showing along the crest the truncated ...
... containing not less than 30 acres of arable land , sank down with all its fields , hedgerows , and path- ways . This sunken mass , where it broke away from the upland , left behind it a new cliff , showing along the crest the truncated ...
Página 52
... containing 330 cottages and outhouses , and 457 inhabitants . To this day , huge angular blocks of sandstone lying ... contain carbonic acid , 52 CHAP . RECORDS LEFT BY SPRINGS.
... containing 330 cottages and outhouses , and 457 inhabitants . To this day , huge angular blocks of sandstone lying ... contain carbonic acid , 52 CHAP . RECORDS LEFT BY SPRINGS.
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Términos y frases comunes
abundant abundantly accumulated acid Ammonites basin beds bones bottom Brachiopods calcareous calcite Cambrian carbonate of lime Carboniferous Chapter characteristic chiefly clay containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Eocene eruptive rocks Europe evidence example extinct fauna feet thick fishes fissures formations fossils genera geological history geologist glacier globe gneiss gradually granite gravel ground iron Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic miles Miocene molten mountains natural North occur Old Red Sandstone organic remains original Palæozoic period Permian plants and animals Pliocene present preserved probably quartz rain regions represented rivers sand schists sea-floor sediment sedimentary rocks shales sheets shells siliceous Silurian slopes soil solid sometimes species stone strata stratified stream structure substance surface terrestrial Tertiary trace Triassic Trilobites upper valley various vegetation vent volcanic