Submarine-fan facies associations of the Upper Cretaceous and Paleocene Gottero Sandstone, Ligurian Apennines, Italy |
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| Authors: | Tor H Nilsen and Ernesto Abbate |
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| Institution: | (1) U.S. Geological Survey, 345 Middlefield Road, 94025 Menlo Park, California, USA;(2) Istituto di Geologia, Universita di Firenze, Via Lamarmora 4, 50121 Florence, Italy |
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| Abstract: | The Upper Cretaceous and Paleocene Gottero Sandstone was deposited as a small deep-sea fan on ophiolitic crust in a trench-slope
basin. It was thrust northeastward as an allochthonous sheet in Early and Middle Cenozoic time. The Gottero, as thick as 1500
m, was probably derived from erosion of Hercynian granites and associated metamorphic rocks in northern Corsica. Outcrops
of inner-fan channel, middle-fan channel and interchannel, outer-fan lobe, fan-fringe, and basin-plain facies associations
indicate that the depositional model of Mutti and Ricci Lucchi for mixed-sediment deep-sea fans can be used. The original
fan had a radius of 30 to 50 km.
Margin setting represents fan and/or source area |
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