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Geology of the late Miocene south-eastern Volterra Basin (Northern Apennines, Italy)

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  • Alessandro Ielpi
  • Gianluca Cornamusini

Abstract

We present a 1:10,000 scale geological map for the south-eastern sector of the Volterra Basin (Northern Apennines, Italy), together with supporting stratigraphic-structural data. The Volterra Basin consists of a major structural depression within the Northern Apennines hinterland, NNW-SSE-oriented and filled with more than 2000 m of late Miocene-Quaternary deposits. Its south-eastern sector is classically considered as a type area for late Tortonian non-marine strata, here mapped and refined in terms of internal stratigraphy adopting a scheme of depositional and lithostratigraphic units. Stratigraphic assessments helped in redefining the character of the lower boundary of the non-marine succession, as well as in mapping a newly recognized angular unconformity. Deformation structures affecting the basin fill include blind normal faults rooted to a deep detachment, outcrop-scale transtensional faults and clusters of gentle folds. Faults and folds appear to be kinematically linked. Our structural observations largely agree with those present in the literature, supporting a model of post-orogenic crustal stretching.

Suggested Citation

  • Alessandro Ielpi & Gianluca Cornamusini, 2016. "Geology of the late Miocene south-eastern Volterra Basin (Northern Apennines, Italy)," Journal of Maps, Taylor & Francis Journals, vol. 12(1), pages 12-25, January.
    • Handle: RePEc:taf:tjomxx:v:12:y:2016:i:1:p:12-25
    DOI: 10.1080/17445647.2014.946105
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