when I do stratigraphy drawings, I start with a paper sketch taken from  
known elevations. 
I then apply a glue stick to a place on the drawing, and smear  some of the 
soil matrix on the sheet for grain size, inclusion  description and Munsell 
Color Chart comparison. I also take a film can full  of sample soil to better 
describe this material in the lab. I then (generally)  roll a sheet of mylar over 
the wall and use a Sharpie to mark the delineations,  rocks, rodent holes, 
etc. and compare it to the paper version. Oh, I know, it is  not as fancy as the 
Harris Matrix, but it works.
 
Ron May
Legacy 106, Inc.