<span>Rifting and crustal thinning are characteristic of a Rift plate boundary.</span>
<span>The borders of new nations were artificially drawn.</span>
The correct answer is C. multiple the contour interval by the number of lines between the index contours
Answer is the united states
The Richter scale is used, from 0.1 to 9.0 magnitude. The Richter scale is determined from the logarithm of the amplitude of waves recorded by seismographs.