Which parts of north america have not been added to the continent since the precambrian?

Stable regions of the craton where shields are covered by sedimentary rocks are called platforms.

Precambrian rocks are often called basement rocks because they lie beneath a covering of fossil-bearing sedimentary strata.

Various Precambrian provinces can be delineated within the North American continent, based on radiometric ages of rocks, style of folding, and differences in trends of faults and folds.

your answer would be just capitalism.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.