Outlines of Field-geologyMacmillan and Company, 1879 - 222 sider |
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Side xii
... 82 888 90 strata 24. True dip concealed by superficial disturbance of the 96 97 25. Inclined strata appearing horizontal when exposed at a right angle to the dip 98 FIG . 26. Map showing the data from which a xii LIST OF ILLUSTRATIONS .
... 82 888 90 strata 24. True dip concealed by superficial disturbance of the 96 97 25. Inclined strata appearing horizontal when exposed at a right angle to the dip 98 FIG . 26. Map showing the data from which a xii LIST OF ILLUSTRATIONS .
Side 51
... appear nearly homogeneous . In his field - work , therefore , the learner will discover by experience what are the essential characters in each case . Reserving more precise and detailed investigation for indoor - work ( see Chap . XVI ...
... appear nearly homogeneous . In his field - work , therefore , the learner will discover by experience what are the essential characters in each case . Reserving more precise and detailed investigation for indoor - work ( see Chap . XVI ...
Side 56
... appear only under the microscope , might be placed by the field - geologist among the compact series ) ; porphyritic - having large crystals , usually of felspar , scattered through a compact. FIG . 8. - Piece of lava , showing crystals ...
... appear only under the microscope , might be placed by the field - geologist among the compact series ) ; porphyritic - having large crystals , usually of felspar , scattered through a compact. FIG . 8. - Piece of lava , showing crystals ...
Side 63
... appear . The iron is there converted into the hydrous peroxide , limonite . Basalt rocks show this change in a most instructive manner . Earthy manganese also gives dark brown to black tints . Yellow . The colouring material of yellow ...
... appear . The iron is there converted into the hydrous peroxide , limonite . Basalt rocks show this change in a most instructive manner . Earthy manganese also gives dark brown to black tints . Yellow . The colouring material of yellow ...
Side 71
... appear- ance of even the same species of fossil in different places and kinds of rock . In some rare examples the body of the animal has been so entirely and perfectly preserved that its flesh when first disinterred may actually be ...
... appear- ance of even the same species of fossil in different places and kinds of rock . In some rare examples the body of the animal has been so entirely and perfectly preserved that its flesh when first disinterred may actually be ...
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abundant angle anticlinal augite bands basalt beds Cambridge cavities CHAPTER character chip clay clinometer College colour constituents course Crown 8vo crystalline rocks crystals deposits direction district dyke ELEMENTARY TREATISE evidence examination example exposed fault Fcap felspar field field-geologist field-work foliated foliated rocks formations fossils fracture fragments geological map geological structure Geological Survey geologist glass gneiss granite gravel ground hammer horizontal hornblende igneous rocks inclined interbedded intrusive iron kind lava Lecturer limestone LOCKYER marked mass microscope miles minerals nature Nicol prisms numerous Illustrations observer occur Old Red Sandstone original outcrop Owens College P. G. TAIT Philosophy PHYSICAL piece plate Professor recognise Red Sandstone region scale schists Science scientific Second Edition seen shales side silicates slice soil sometimes specimens stone strata stratum streams strike surface synclinal texture thickness thin tion traced tuff unconformability valleys varieties veins vertical volcanic weathered
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