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The ‘Île Crémieu’ (Jura, France), a limestone plateau spared from tectonics?

Muriel Rocher, Marc Cushing, Francis Lemeille, Stéphane Baize
C. R. Geoscience 336 (2004) 1209–1218

Document type > *Article de revue

Keywords > earthquakes

Research Unit > IRSN/DEI/SARG/BERSSIN

Authors > BAIZE Stéphane, CUSHING Edward, LEMEILLE Francis, ROCHER Muriel

Publication Date > 01/10/2004

Summary

The ‘Île Crémieu’, a plateau of Jurassic limestones located in the southern border of the Bresse and at the Jura front, is generally considered as non-deformed. Quaternary ice sheets and drainage have underlined and cleaned out some fracture planes trending NNE and NW–SE that border and crosscut the ‘Île Crémieu’. The analysis of seismic profiles reveals NNE-trending normal faults and NW–SE-trending strikeslip faults, crosscutting the basement to Late Miocene layers. Microtectonic fieldwork shows that these faults exist and were activated during the main Cainozoic tectonic events.

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