On 26 Apr 2018, at 12:37 , Onana Jacques Bertrand <[log in to unmask]> wrote:

Thank you Mr Antonio for your intervention. and all membrers. I'm very glad about these exhanges.

The environment is a hill in the shape of a dome. bodinage foliation in migmatites forms series of folds with an average dipping angle of 10-20 ° (practically horizontal) and vertical axial planes. the hinge dip in all directions on the outcrop. If the foliation is horizontal, the maximum stress sigma 1 is vertical. I wonder too. is this type of foliation not a fold of flow? can be the result of a mantle climb?

Best regards,

in fact the outcrop is on a migmatitic hill. migmatites show a foliation of boudinage. The limb hang in  NNE and SSW directions, then in all other directions. 

the boudinage is the result of extension 

Thank you for all papers you sent me, I will consult them.

Le mercredi 25 avril 2018 à 22:55:57 UTC+2, Antonios Marsellos <[log in to unmask]> a écrit :

The first response would be extension by pure shear if it applies to one rock, but there are exceptions once observation is more detailed and not referred to more rocks at a study area. Perhaps, multistage extension overprinting one another? Along the foliation, I guess you mean to one plane and not in all directions of multiple planes.  Is the extension uniformly distributed along all directions? - could you please be more specific? Also, what type of rock does it host this boudinage?

Antonios Marsellos

Hofstra University

New York, USA

On Wed, Apr 25, 2018 at 3:35 PM, Haakon Fossen <[log in to unmask]> wrote:

Sounds like general flattening (extension in all directions along the foliation)

hf

On 25 Apr 2018, at 15:57, Onana Jacques Bertrand <00001e61ee568de7-dmarc- [log in to unmask]> wrote:

Hi dear members of Geo-tectonics!

Please someone can explain me The meaning of foliation boudinage that dips in all directions?