curtain fold

Type of approximately cylindrical fold common in mylonites with its fold axis subparallel to the stretching lineation. Curtain folds lack the closed tubular shape of sheath folds. An older name for this structure is oblique fold

Related terms:

• sheath fold
• cross fold
• closed fold
• amoeboid fold
• flanking fold
• symmetrical fold
• tight fold
• Overturned Fold
• composite fold
• major fold