594 



KEPOKT OF (tFFICK <>F KXTKULMKNT STATIONS. 



(iK<>l,l>^;^ IL'O iiurus. 



TjIK KAKTll IN ITS ItKLATION 'lo TlIK SOI.Alt SYSTK.M. 



The Atiiiosplierc — composition, voliiinc, and weight. 



The ( )(reaii — coinpoHition, volunic, ;ui<l wcijilit. 



TlieSoliil ( il(il)L' — I iOlcnic'iits n instituting rocks, 

 dinn' n si on 8, ■«». , ... .. , 



^hapc, an.l con- ^ ^^"'^'"^^^ constituting rocks. 



4itutiun. 



.Rocks. 



Geoonosy: The ma 



TKUIAI-S OK TUE{ 

 EAKTU. 



Pi'inciiiU's 

 involved. 



The weathering of 

 rocks and for- 

 mation of soil. 



Considera- 

 tions of 

 special 

 cases. 



Dynamical GEOLociY. 



Action of tlie atmosj>liere and 

 of heat and cold. 



Chemical action f)f water. 



Mechanical action of water and 

 ice. 



Action of plants ami animals. 



Weathering of granite, gneiss, 

 trappean rocks, sandstone, 

 limestone, slate, etc. 



Proportional amounts of vari- 

 ous constituents removed or 

 lost._ 



Physical manifestations of 

 weathering — size and sliape 

 of resultant pai'ticies, and 

 their chemical composition. 



Voloanne.'J, hot springs, and geysers. 



Earthijuakes. 



ri)heaval and depression. 



Circulation of water in springs, rivers, and oceans. 



Glaciers and glaciation. 



Erosion and deposition. 



INIetamorphism. 



Structural GEOLo(;vM':^l."i?^^*"''V'^ *''*" earth's crust, statitication an.l bedding, 



(^ jointing, cleavage, mode oi occurrence ot rock masses. 



Str.\tigrapiik' geol- [General principles, 

 o G Y ( historical I Development of life. 

 geology). [Development of continents. 



Man as a geolocji- (The earth a,s modified by human action; effects of deforesta- 

 CAL agent. I tion, etc. 



Ore deposits — occurrence and mode of deposition. 



Ores of the metals. 



The nonmetallic minerals. 



Building and decorative material. 



Road metal. 



^Mineral waters, artesian waters, etc. (hydrography). 



Soils — surveys and mapping. 



Physiograi'uic tiEoL- J Physiography — its intluence on distribution and development 

 OGY. \ of the human race, etc. 



Economic geolo(;v 



