overfold

noun /ˈəʊvəfəʊld/

1. A fold whereby the strata are forced through an angle of more than 90 degrees, so that younger strata lie below older ones.

   Thrusts were directed there; major overfolds bulged outwards towards the north.

Where it comes from

From over- + fold; in the geological sense, after German Überfaltung (“overfolding”).

Adapted from the Wiktionary entry overfold (CC BY-SA 4.0).

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