From Eileen Holttum
Kate Ravilious’s account of the Gamburtsev mountains in Antartica mentions the Rockies as an example of a range created by tectonic activity (12 May, p 38). In North America, is it not the Cascade and Sierra Nevada ranges that are currently rising from tectonic movement, rather than the Rockies?
The editor writes:
Yes, those would have been clearer examples.
Edinburgh, UK
