Symbols for soil and
rock
Penetration resistance and soil properties on basis of the standard penetration
test
[http://1.bp.blogspot.com/-_TmQtZqUheU/VRPzcgFyqpI/AAAAAAAAA9E/dM4vl1AkVew/s1600/9a3a6ab31f30c22f911488eaa8639b.png]

[http://2.bp.blogspot.com/-DppJcF5me_s/VRPzhwplhxI/AAAAAAAAA9M/RqX9NgH_4O0/s1600/95ce5ef0dff4bfedf4ad413fa8b0d4.png]