Open-air Studies in Geology |
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... Lava - flow Frontispiece To face page 42 " " 560 586 56 " " 76 99 96 99 150 " " 172 · VII . Dyke of Dolerite , Quarry on Cave Hill , Belfast VIII . Columnar and massive Lava - flows at Pleaskin Head , Co. Antrim 181 99 183 IX . Granite ...
... Lava - flow Frontispiece To face page 42 " " 560 586 56 " " 76 99 96 99 150 " " 172 · VII . Dyke of Dolerite , Quarry on Cave Hill , Belfast VIII . Columnar and massive Lava - flows at Pleaskin Head , Co. Antrim 181 99 183 IX . Granite ...
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... Lava - flows descending from Puys in Auvergne 176 177 19. Granite Pinnacles , Mourne Mountains . 193 20. Unconformable Junction , with Overlap and Overstep 219 21. Internal cast of a Cerithium , Portland Stone · 221 22. a . Pecten ...
... Lava - flows descending from Puys in Auvergne 176 177 19. Granite Pinnacles , Mourne Mountains . 193 20. Unconformable Junction , with Overlap and Overstep 219 21. Internal cast of a Cerithium , Portland Stone · 221 22. a . Pecten ...
Page 2
... lava upon the surface ; the sea worked against the land , and washed the coast steadily away ; while in other places tawny rivers wan- dered through the plains and thrust their burden of mud in long banks far to seaward . Thus the earth ...
... lava upon the surface ; the sea worked against the land , and washed the coast steadily away ; while in other places tawny rivers wan- dered through the plains and thrust their burden of mud in long banks far to seaward . Thus the earth ...
Page 151
... lava , issues from the ground . Explosions occur , and " cinders " and " ashes " are scattered freely round the vent . Occasionally the lava itself flows out as a slowly moving stream , invading the lower slopes of the country . The ...
... lava , issues from the ground . Explosions occur , and " cinders " and " ashes " are scattered freely round the vent . Occasionally the lava itself flows out as a slowly moving stream , invading the lower slopes of the country . The ...
Page 152
... lava into fragments and sending them spinning hundreds of feet into the air . Such flecks of melted rock , fluid at the moment of their ejection , become spherical or elongated as they move swiftly upwards ; a compact and often glassy ...
... lava into fragments and sending them spinning hundreds of feet into the air . Such flecks of melted rock , fluid at the moment of their ejection , become spherical or elongated as they move swiftly upwards ; a compact and often glassy ...
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alluvial alluvium Alps andesite augite banks basalt become beds beneath blocks calcium carbonate Chalk character CHARLES GRIFFIN chemical clay cliffs coast colour cone Cretaceous Crown 8vo crust crystalline crystals denudation deposits dykes earth Engineer Eocene escarpment EXETER STREET feet felspars flint flow folded fossils Fully Illustrated Geol Geology glacier glass gneiss grains granite Handsome Cloth hills hollow Hornblende igneous iron Juras Jurassic lake Lake Bonneville land Large 8vo lava layers Leith Hill limestone LONDON lower marine mass material Mesozoic mica miles minerals Miocene mountain occur orthoclase oxide pebbles plain plane Plates Pliocene Practical produced Professor pyroxene quartz region Revised rhyolite ridge rise river rock round salts sand sandstone SECOND EDITION seen shells side silica slope specific gravity steep stones STRAND strata stream structure summit surface TEXT-BOOK unconformity upper valley volcanic Wealden wind
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