Talk:Principle of superposition

In its plainest form, it [the principle of superposition] states that layers of rock (strata) are arranged in a time sequence providing they have been unaltered since their formation.

The English is wrong, but it could be corrected in two different ways, with significantly different meanings:


 * ...are arranged in a time sequence, provided that they have been unaltered...


 * ...are arranged in a time sequence, proving that they have been unaltered...

I chose the first.
 * Concur with your choice. We're identifying an assumption, not proving a conclusion.  Good catch!  Ungtss 10:22, 5 June 2006 (CDT)