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The alpine Chenaillet ophiolite is characteristic of an oceanic crust created at a low spreading ridge. The sequence is discontinuous and differs from the classical sequence of the Penrose conference.
From the bottom to the top of the SW ridge of the Chenaillet, we have the sequence : serpentinized mantle, isotropic gabbro and pillows lavas. The dyke complex is missing. Only a few dykes crosscut the serpentinite or the gabbro. Sometimes, the sediments directly lie on the serpentinized mantle.
View towards the NE from the Sommet des Anges.
PhotoID306

The alpine Chenaillet ophiolite is characteristic of an oceanic crust created at a low spreading ridge. The sequence is discontinuous and differs from the classical sequence of the Penrose conference.
From the bottom to the top of the SW ridge of the Chenaillet, we have the sequence : serpentinized mantle, isotropic gabbro and pillows lavas. The dyke complex is missing. Only a few dykes crosscut the serpentinite or the gabbro. Sometimes, the sediments directly lie on the serpentinized mantle.
View towards the NE from the Sommet des Anges.
PhotoID306

Photograph: c.nicollet

Reference: http://christian.nicollet.free.fr/page/Alpes/chenaillet/chenaillet.html