Outlines of Field-geologyMacmillan and Company, 1890 - 222 pages |
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Common terms and phrases
abundant angle anticlinal apatite augite bands basalt beds calcite carbonate cavities CHAPTER character chip clay clinometer colour constituents course crystalline rocks crystals deposits detailed diorite direction district dyke earth's crust evidence examination example exposed fault felspar field field-geologist field-work foliated formations fossils fragments fresh fracture geological map geological structure Geological Survey geologist glass gneiss granite gravel ground hammer horizontal hornblende igneous rocks inches inclined iron kind lava limestone marked mass microscope miles minerals mountain nature Nicol prisms note-book observer obtained occur Old Red Sandstone once organic remains original outcrop piece quartz recognise Red Sandstone region sand scale schists seen shales side silicates slice soil solid rock sometimes specimens stone strata stratum stream strike superficial synclinal texture thickness thin tion topographical traced traverses tuff unconformability underneath valleys varieties vegetation veins vertical volcanic water-worn