This might not be it:
Nothing that happened on Thursday has changed that. Murdoch and his media – like all media – live in a world of tectonic change.
Tectonic: slow? Millimetric? Entirely invisible to the human senses? At the speed of continental drift?
Not, really, quite how I would describe the last few decades in the media, no.
‘A little learning is a dangerous thing…’ in this case, knowing that ‘seismic’ (which is the word being groped for) events are caused by the movement of tectonic plates. Bit like R. Murphy, really – a very slow brain causing disastrous errors of reasoning.
All quite exciting. But they got rid of the wrong red top.
‘Least he didn’t call it a “quantum” change: that really would have brought out lots of wittering.
These things are “all relative” dearieme.
Don’t see what’s wrong with it. It means “structural” from the Latin word “tectonicus” which means a building or structure.