ISSN:
1365-3121
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
Syn-orogenic deposits that occupy foredeep basins commonly experience contraction related to the migration of fold-and-thrust systems toward the foreland. This contraction may overprint the earlier extensional deformation that is related to the initiation of the basin. Although predicted by models for foredeep development, evidence for extension predating contraction at different scales is not extensively recorded in syn-orogenic deposits. Mesoscopic structures from the Contessa section, in the Umbria-Marche Apennines, Italy, reveal a complex history, characterized by extension soon before the contractional deformation. Normal faults predate the folds and thrusts that are related to the Miocene-age orogenic event responsible for the development of the Apennines. Extensional deformation may have resulted from flexuring of a lithospheric plate induced by the load of a stacking thrust pile. The transition from extension to contraction could play an important role in the evolution of belt–foredeep–foreland systems, as it could reflect the migration of advancing thrust fronts toward the foreland.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1365-3121.1999.00225.x
