Talker to my brother in law – a geologist – yesterday whilst out on a bike ride (interrupted to drop in to their flat)(thanks for the sherry and crisps! That’s what I call ‘a bike ride’!). He said ‘PERICLINE’ was a word. Indeed it is:
The Mendips are an example of anticlinal folds, recognised on geological maps by a concentric outcrop pattern with the oldest rocks at the core. The distinctively shaped variety of anticline that forms each of the Mendip Hills is known as a pericline.
So that’s it: Syncline / Anticline / Pericline
Ralph Hoyte 27/4/15