axial-plane foliation

Foliation developed in rocks parallel to the axial plane of a fold and perpendicular to the chief deformational pressure.

Related terms:

• axial planar foliation
• axial-plane cleavage
• axial-plane schistosity
• axial plane
• axial-plane separation
• axial trace
• axial stream
• b-c plane
• active foliation
• Foliation