Elements of Geology, for the Use of Schools

abundant acid alluvial deposits appear arranged augite basalt bodies bones called carbon cavities chalk chlorite classes clay coal formation color compact composed crater crystalline crystals deluge depth diluvial dykes earth earthquakes effects eruption Eurite existing extensive facts feet feldspar fissures fossils frequently geologists Geology globe gneiss granite gravel graywacke gypsum hornblende imbedded iron islands kind of rock lakes land lava layers lias lime limestone masses of rock materials melted mica mica slate miles minerals moun mountain observed occur ocean oolite organic remains oxygen peat pebbles phenomena pororoca porphyry present primitive rocks quantity quartz red sandstone remarkable rivers rock salt salt springs sand secondary rocks serpentine shale shew sienite silex situation slaty sometimes stone strata stratification structure submarine volcanos substances sulphur surface tain talc tertiary rocks tertiary strata thickness tides tion transition rocks trap rocks upper secondary various vegetable veins violent volcanic rocks volcanos