 They are associated with both compressional settings (involving folding and overthrusting) and extensional settings.The term was first used by geologists studying the structure of the Swiss Jura Mountains, coined in 1907 by A. Buxtorf, who released a paper that theorized that the Jura is the frontal part of a décollement at the base of a nappe, rooted in the faraway Swiss Alps.Marcel Alexandre Bertrand published a paper in 1884 that dealt with Alpine nappism.