Subsurface Laboratory Methods 



123 



Three or more of the terms, "well-rounded," "rounded," "sub- 

 rounded," "subangular," and "angular," are generally used to describe 

 roundness or angularity in megascopic and binocular examinations. There 

 has been no general agreement as to the meanings of these terms. For 



Coarse Silt 



Very Fine Sand 



Fine Sand 



Medium Sand 



Figure 52. Textural standard for sam- 

 ple work. Dots do not represent true 

 grade size. 



