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Journal of the Geological Society

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First results from the CROP-11 deep seismic profile, central Apennines, Italy: evidence of mid-crustal folding

^{1 1}Dipartimento di Scienze Geologiche, Università ‘Roma Tre’, Largo S. L. Murialdo, 1, 00146 Rome, Italy (e-mail: billi@uniroma3.it)
^{2 2}Istituto Nazionale di Geofisica e Vulcanologia, 00143 Rome, Italy
^{3 3}Istituto di Geologia Ambientale e Geoingegneria, CNR, 00185 Rome, Italy
^{4 4}ChevronTexaco Energy Technology Co., San Ramon, CA 94583, USA
^{5 5}Department of Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, USA
^{6 6}Dipartimento di Idraulica, Trasporti e Strade, Università ‘La Sapienza’, 00184 Rome, Italy
^{7 7}Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, 34010 Trieste, Italy

The CROP-11 deep seismic profile across the central Apennines, Italy, reveals a previously unknown, mid-crustal antiform here interpreted as a fault-bend fold-like structure. The seismic facies and gravity signature suggest that this structure consists of low-grade metamorphic rocks. Geomorphological, stratigraphic and tectonic evidence in the overlying shallow thrusts suggests that this structure developed in early to mid-Messinian time and grew out of sequence in late Messinian–Pliocene time. The out-of-sequence growth may reflect a taper subcriticality stage of the Apenninic thrust wedge, which induced renewed contraction in the rear.

This article has been cited by other articles:

				A. Billi and M. M. Tiberti Possible causes of arc development in the Apennines, central Italy Geological Society of America Bulletin, September 1, 2009; 121(9-10): 1409 - 1420. [Abstract] [Full Text] [PDF]