En echelon extension fractures as precursors for a shear fracture

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En echelon extension fractures as precursors for a shear fracture En echelon extension fractures as precursors for a shear fracture. Staining of K-feldspar by fluid-rock interaction as fluids flowed along incipient fractures, Øygarden, Norway © Haakon Fossen

Stylolite, bed-parallel, UT © Haakon Fossen

Stylolites in carbonate sandstone, San Rafael Reef, Utah © Haakon Fossen

Stylolite, tectonic, normal to bedding, formed during Laramide layer-parallel shortening, San Rafael Reef, Utah © Haakon Fossen

Single cataclatic deformation band, Goblin Valley, Utah © Haakon Fossen

Cataclastic deformation bands (left) and non-cataclastic (disaggregation) bands (larger offsets), Chimney Rock, Utah © Haakon Fossen

Shear-enhanced compaction band, Valley of Fire © Haakon Fossen

Pure compaction band, Chevron-type,Valley of Fire. © Haakon Fossen

Pure compaction bands and shear-enhanced compaction bands, Utah © Haakon Fossen

Cataclastic deformation band, Nubian Sst, Sinai © Haakon Fossen

Deformation band cluster zone, Goblin Valley, Utah © Haakon Fossen

Conjugate normal deformation bands, Goblin Valley, Utah © Haakon Fossen

Conjugate normal deformation bands and deformation band zones, Provence © Haakon Fossen

Conjugate reverse deformation bands, Arroy Grande, California © Haakon Fossen

Reverse deformation band cluster bounding hydrocarbon filled compartment in sandstone, ArroyGrande, California © Haakon Fossen

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