1036 



Subsurface Geologic Methods 



Figure 545 Coordination of mineralogic symbols on micro-slcetclies and paragenetic sequence rep- 

 resentation. Sketches are drawn on standard letter-size field subsurface note sheets. 



Questions 

 What two geologic representation phases are important in mineral 

 exploration? 



What are five feature classifications which should be mapped? 

 What criticism can be made of published government survey maps? 

 Why is 50' scale preferable to 40' scale for detailed mapping? 

 What are "odd" mapping scales? 



6. What mapping scales are recommended in this paper? 



7. Why is the use of these scales advantageous? 



8. Why is it desirable that coordinate values of the initial point in an 

 area be five digit numbers? 



What size office maps are recommended and why? 

 What are the advantages of using an 8" x 10" field-subsurface note 

 sheet? 



9. 

 10. 



