Re: Upper boundary of argillic horizon and evidence of illuviation?

Thanks for your response!

That is how I have always interpreted it. And how it seems to have been interpreted in a lot of the older data from the survey I'm working on. And how almost everyone else I have asked what they thought interprets it.


BUT I've been challenging my assumptions about ST lately... and really digging into the wording (or lack thereof)... and found some pretty specific statements in the Argillic horizon big mauve ST book about the lack of requirement of observing the illuviation at the upper boundary. I think that guidance is pretty clear... my main question is whether that guidance is the official stance.