Faith writes:
Let me see if I can be clearer: the definitions seem artificial and illogical. Something you use to label a formation but without any clear reason why you are doing so.
The reason couldn't be more clear or logical.
Let's pretend for a moment that we occasionally saw a strange phenomenon in the way light dispersed into a rainbow (pardon if I'm not perfect in my term usage here). For some strange reason we see a rainbow with a few missing colors (say orange, yellow and green).
If we applied the geological term "unconformity" to this situation, it would be the contact point between the Red and the Blue. In other words, it's the point where two things meet that would not normally ever meet each other.
And someone please correct me if I'm wrong - I'm new.
JB