DIFFERENCE BETWEEN MINERALS AND ROCKS 187 



solid rock which constitutes the main part of the crust of the 

 earth. This is called bed rock. Rock may be carried by 

 streams and deposited in other places, where it has not previ- 

 ously formed a part of the earth, and this is called transported 

 rock. 



References : 



1. 1205:22-28. 



2. 1304:32-33. 



3. 1601:38-43. 



Movements of the Mantle of Rock Waste. 

 Rocks of the Earth's Crust. 

 Influence of Rock Structure in Soil For- 

 mation. 



What the Earth is Made Of. 

 How Rocks are Made. 

 Definition and Occurrence of Rooks. 

 How Common Rocks are Made. 

 The Formation of Rocks. 

 Classification of Rocks. 

 Transportation and Deposition by Wind. 

 Transportation of Rock by Running Water. 

 Rock and its Structure. 

 Kinds of Rocks. 

 Mantle Rock. 



134. THE DIFFERENCE BETWEEN MINERALS AND ROCKS 



A rock is a combination of several minerals, usually less 

 than four, and is a part of the earth's crust. A mineral is a 

 definite chemical compound, existing in rock masses, or alone. 

 Those minerals from which a desired element may be obtained 

 easily are called ores. 



References : 



1. 1205:286-290. 



2. 1304:406-408. 



3. 1703:334. 



a. 1201:107-109. 



Mineral Veins. 



Common Minerals. 



Minerals and Ores Defined. 



Difference between Rocks and Minerals. 



