«Maybe there's been active tectonism that helped shape the landscape,» she says. (discovermagazine.com)
Two points: first, it seems to me that such gravity - induced tectonism provides a far better, and less problematical, explanation for climate variations with Milankovitch cyclicities, including cyclical ice ages, than radiative forcing does. (wattsupwiththat.com)
Aside of that, I would assume that terrestrial volcanoes are more dependent on plate tectonism than sea floor spreading per se. (wattsupwiththat.com)