Abstract
The Aínsa Basin of northern Spain contains a deep-marine succession comprising up to 24 sandstone bodies separated by thick marl-rich
units. A detailed analysis of nine outcrops (>900m of sediment profiles) from the Morillo Formation of the San Vicente Group, from the
upper part of the basin succession, has enabled a reappraisal of the unit. Within the Morillo Formation, sediment transport was to the NW,
and a range of environments are recognized including channels, lobes and pelagic deposits. The overlying Coscojuela Formation, which partly
cuts into the Morillo Formation, shows W-directed palaeocurrents in its proximal reaches, with flows being deflected to the N along an adjacent
slope. Destabilization of the adjacent carbonate platform resulted in a significant input of carbonate material into the flow. The final
phases of sedimentation within the Aínsa Basin were more complex than previously suspected, probably as a result of a combination of factors,
including tectonic activity, resulting in basin narrowing due to anticlinal growth, as well as encroachment and/or destabilization of the adjacent
regional carbonate platforms.
Original language | English |
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Article number | 49 |
Pages (from-to) | 221-238 |
Number of pages | 17 |
Journal | Geological Journal |
Volume | 49 |
Issue number | 3 |
Early online date | 6 May 2013 |
DOIs | |
Publication status | Published - May 2014 |
Keywords
- Spain
- Morillo Formation
- Coscojuela Formation
- Ainsa Basin
- turbidite
- Eocene