Abstract
The Mid-Hungarian Zone is a WSW–ENE trending composite structural unit in the basement of
the Pannonian Basin that is made up of displaced crustal fragments (terranes) of South Alpine and
Dinaridic origin. In the early stage of the Alpine evolution these fragments were located in various
sectors of the NW Neotethys region, representing different paleogeographic settings from passive
margin through continental slope to oceanic basement. Middle to Late Jurassic closure of the
Neotethys led to the development of a suture zone made up of subduction-related complexes that can
be followed all along the strike of the Dinarides. During the Cretaceous compressional stages, nappe
stacks were formed from the accretionary complex and the fragments of the previously disrupted
passive margin. Eastward extrusion (escape) of the ALCAPA Mega-unit during the Oligocene to Early
Miocene led to large-scale displacement of fragments of this nappe stack, transporting them to their
present-day position, and resulted in dispersal of the northwestern segment of the suture zone. The
paper summarizes the basic characteristics of the dislocated blocks, evaluates their relationships and
determines their original setting
