Page 82 - Global Tectonics

CONTINENTAL DRIFT 69

(a)

195
195 60N
215 215
235
235 255
250
270 285
290 305
315 30N
370 345 345
450
385 385 370
435
435
475
450 475
535
405
405 420 0N
90E 120E 150E 180E 210E
500

(b)

195 60N
215 235
250
270
290
315 30N
370
345
385
435
475
450
420 0N
535
90E 405 120E 150E 180E
500

Figure 3.14 Apparent polar wander paths for North America (solid circles and solid line) and Europe (open circles and
dashed line) (a) with North America and Europe in their present positions, and (b) after closing the Atlantic ocean. Ages
for each mean pole position are given in Ma with those for Europe in italics (redrawn from McElhinny & McFadden,
2000, with permission from Academic Press. Copyright Elsevier 2000).