Fold Tightness
Fold tightness is defined by the angle between the fold's limbs, called the interlimb angle. Gentle folds have an interlimb angle of between 180° and 120°, open folds range from 120° to 70°, close folds from 70° to 30°, and tight folds from 30° to 0°. Isoclines, or isoclinal folds, have an interlimb angle of between 10° and zero, with essentially parallel limbs.
Read more about this topic: Fold (geology), Describing Folds
Famous quotes containing the word fold:
“A lady is smarter than a gentleman, maybe,
She can sew a fine seam, she can have a baby,
She can use her intuition instead of her brain,
But she can’t fold a paper in a crowded train.”
—Phyllis McGinley (1905–1978)