Upper miocene carbonate ramp deposits from the southernmost part of Maiella Nountain (Abruzzo, Central Italy) |
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Authors: | Dr Ermanno Danese |
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Institution: | (1) Dipartimento di Scienze della Terra, Universitá degli Studi di Pisa, Via S. Maria, 53, 56126 Pisa |
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Abstract: | Summary The development of carbonate ramp depositional systems in the Neogene of the Mediterranean Region represents a widespread
feature so far analysed in several papers. It is striking to note that the evolution of upper Miocene carbonate ramps, characterized
by the presence of coralgal bioherms, highlights the events leading to the Messinian salinity crisis. The coralgal bioherms
of preevaporite Messinian age exhibit fossil assemblages indicating marine waters with normal salinity, whereas stromatolitic
and microbial encrustations underline the deterioration of the environment during the Messinian salinity crisis. Maiella Mountain
is a broad carbonate massif located in Abruzzo (Central Italy). The late lower Oligocene-Messinian part of its stratigraphic
succession consists of stacked non-tropical carbonate ramp deposits related to third and higher order sequences. The investigations
performed in the southernmost portion of the massif allowed to recognize a complete fourth order carbonate depositional sequence
on a homoclinal ramp of pre-evaporite Messinian age. The presence of small coralgal patch reefs and overlaying microbial encrustations
is significant. A transect exhibits the stratigraphic framework of the area. The data show how local parameters play a notable
role in the development of these deposits. |
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Keywords: | Non-Tropical Carbonate Ramps Coralgal Reefs Maiella Mountain (Central Italy) Late Miocene |
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