Outlines of Field-geology

abundant angle anticlinal augite BALFOUR STEWART 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 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 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