The micropleats reduce the profile of the balloon and pull taut upon inflation to provide an essentially radial symmetry.

Balloons are provided which are formed of at least one balloon material with micropleats distributed about the circumference of the balloon.

A doctor (16) cooperates with the peripheral surface (14) for peeling the tissue (T) away from the peripheral surface (14) such that when the tissue (T) is peeled from the surface, a series of microfolds are generated in the resultant tissue.

The arrangement is such that when the angle (A) is adjusted, the physical dimensions of the microfolds change.

An adjusting mechanism (18) is connnected to the doctor (16) for adjusting an angle (A) defined between the doctor (16) and the peripheral surface (14).

In metamorphic rocks associated with the deeper levels of fault zones, small scale structures such as asymmetric boudins and microfolds are used to determine the sense of displacement across the zone.

The micropleats reduce the profile of the balloon and pull taut upon inflation to provide an essentially radial symmetry.

Balloons are provided which are formed of at least one balloon material with micropleats distributed about the circumference of the balloon.

A doctor (16) cooperates with the peripheral surface (14) for peeling the tissue (T) away from the peripheral surface (14) such that when the tissue (T) is peeled from the surface, a series of microfolds are generated in the resultant tissue.

The arrangement is such that when the angle (A) is adjusted, the physical dimensions of the microfolds change.

An adjusting mechanism (18) is connnected to the doctor (16) for adjusting an angle (A) defined between the doctor (16) and the peripheral surface (14).

In metamorphic rocks associated with the deeper levels of fault zones, small scale structures such as asymmetric boudins and microfolds are used to determine the sense of displacement across the zone.