A. Gilbert Smith, 1972. "Estimation of Tectonic Rotation Poles of Inactive Structures", Studies in Earth and Space Sciences, R. Shagam, R. B. Hargraves, W. J. Morgan, F. B. Van Houten, C. A. Burk, H. D. Holland, L. C. Hollister
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Some inexact methods for estimating tectonic rotation poles are described. It is shown geometrically that each compressive plate margin has a “forbidden sector” in which the pole cannot lie. This may help to delimit the pole position, particularly for large orogenic structures. Five present-day compressive zones are examined, and their respective poles lie generally in line with the zone and about 20° to 40° from one end of it. A possible Atlantic-Mediterranean reconstruction is consistent with these findings.