Balanced cross-sections and their implications for the deep structure of the northwest Alps: reply |
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| Authors: | Robert WH Butler |
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| Institution: | Department of Geology, University College, Singleton Park, Swansea, West Glamorgan SA2 8PP, U.K. |
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| Abstract: | The structure of the northwest external French Alps, around the internal Belledonne and Mont Blanc massifs in the Beaufortain area, can be explained by foreland (WNW) propagating thrust tectonics. The internal Belledonne massif is interpreted as having developed by imbrication of an originally thin ‘skin’ of basement with a Mesozoic cover. Above this massif all thrusts tend to climb lateral sections to the south to converge with the frontal Pennine thrust: the southern termination of the Mont Blanc massif is merely a spectacular example of such a lateral ramp. |
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