Standard for Graph soil
24-Feb-95 18:05:42
Sb: #170195-Standard for Graph soil
Fm: Jim Yahr 71524,1252
To: Steven Markowitz 72072,3533
Steven,
This is probably negative help, but, the USGS _Suggestions to Authors of the
Reports of the United States Geological Survey_, Seventh Edition, p.55, simply
says: <Standard patterns indicate rock types>. They are discussing the
construction of columnar sections for publication by the USGS. My (very old)
copy of Robert Compton's _Manual of Field Geology_ has an appendix of suggested
patterns but doesn't discuss the origins of these patterns.
Good Luck,
Jim