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Shear Band Domains

Figure 1a shows a map of deformation bands of shear band type with normal sense of displacement on a pavement of the Entrada Sandstone exposed near the Horse Seep Creek, Goblin Valley, southeastern Utah. The central domains (II, III, and IV) have four sets with perfectly orthorhombic symmetry as illustrated in the photograph in Figure 1b. Domain I and a part of Domain V are slightly more complex if they aren't further divided into smaller domains.

Domains of normal sense of shear bands with 30 to 50-degree intersection angles in the Entrada Sandstone exposed at a pavement near Horse Seep Creek, Goblin Valley, San Rafael Desert, southeastern Utah (Aydin, 1977; Aydin and Reches, 1982). The central domains (II, III, and IV) have four sets with perfectly orthorhombic symmetry (see (b)). Parts of domains I and V exhibit complications.Figure 1. Domains of normal sense of shear bands with 30 to 50-degree intersection angles in the Entrada Sandstone exposed at a pavement near Horse Seep Creek, Goblin Valley, San Rafael Desert, southeastern Utah (Aydin, 1977; Aydin and Reches, 1982). The central domains (II, III, and IV) have four sets with perfectly orthorhombic symmetry (see (b)). Parts of domains I and V exhibit complications.

Large map-scale shear band domains can be found in Zhao and Johnson (1992) which is given under 'Multiple Shear Band Sets.'

Reference:

Aydin, A., 1977. Faulting in sandstone. Ph.D thesis, Stanford University, 246 p.

Aydin, A., Reches, Z., 1982. The number and orientation of fault sets in the field and in laboratory. Geology 10: 107-112.

Zhao, G., Johnson, A.M., 1992. Sequential of deformation recorded in joints and faults, Arches National Park, Utah. Journal of Structural Geology 14 (2), 225-236.



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