Lower Oligocene thrust-system in the epi-Ligurian succession: evidence from the Enza Valley (northern Apennines, Italy)
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- 作者：Catanzariti ; Rita ; Feroni ; Andrea Cerrina ; Ottria ; Giuseppe ; Vescovi ; Paolo
- 关键词：northern Apennines ; epi-Ligurian succession ; thrust tectonics ; Lower Oligocene ; calcareous nannofossil biostratigraphy ; Apennins du Nord ; succession é ; piligure ; Oligocè ; ne infé ; rieur ; chevauchements ; biostratigraphie à ; nannofossil
- 刊名：Geodinamica Acta
- 出版年：1999
- 出版时间：March 4, 1999
- 年：1999
- 卷：12
- 期：2
- 页码：81-96
- 全文大小：1.34 M
文摘
Within the lower part (Upper Eocene-Oligocene) of the epi-Ligurian succession, outcropping in the Emilian side of the northern Apennines (Enza Valley), duplications by thrust tectonics were recognized through the systematic integration of field geology with calcareous nannofossil biostratigraphy. This thrust system, derived from the overthrusting of two thrust-sheets over a footwall, is unconformably overlain by a Rupelian succession. The thrust structure of the Enza Valley, affected by a subsequent wide overturned syncline together with the unconformable succession, shows a remarkable Lower Oligocene contractional tectonics, previously not recognized in the northern Apennines.