Outlines of Field-geologyMacmillan and Company, 1879 - 222 sider |
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Side xii
... 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 .
... 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 21
... angle to the axis of the shaft . If placed upright or in the same line with the shaft , much of its efficiency is lost , especially in wedging off plates of shale or other rocks . A hammer shaped as I recommend serves at times for other ...
... angle to the axis of the shaft . If placed upright or in the same line with the shaft , much of its efficiency is lost , especially in wedging off plates of shale or other rocks . A hammer shaped as I recommend serves at times for other ...
Side 24
... angle at which strata are placed to the horizon - an important observation in the investigation of the geological structure of a country , and one having frequently a special economic value , as , for instance , when it points out the ...
... angle at which strata are placed to the horizon - an important observation in the investigation of the geological structure of a country , and one having frequently a special economic value , as , for instance , when it points out the ...
Side 39
... angles , of dip and of trends of boundary so nearly ac- curately as to make him often independent of hammer , compass , and clinometer . In like manner long experi- ence quickens his eye to detect geological evidence . where a less ...
... angles , of dip and of trends of boundary so nearly ac- curately as to make him often independent of hammer , compass , and clinometer . In like manner long experi- ence quickens his eye to detect geological evidence . where a less ...
Side 97
... angle by the FIG . 24.- 4. — True dip concealed by superficial disturbance of the strata . clinometer . In determining these points it is always desirable to see more than a mere projecting edge of rock , for sometimes what seems to be ...
... angle by the FIG . 24.- 4. — True dip concealed by superficial disturbance of the strata . clinometer . In determining these points it is always desirable to see more than a mere projecting edge of rock , for sometimes what seems to 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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