Ductile Structures Photos
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Ductile shear zone in granitic rock
Ductile shear zones affecting granitic rock and mafic enclave, southern California (240104-18)
Download ImagePassive folding in gneiss, Greenland (Vertical)
Passive folding in Archean gneiss in Nuuk, Greenland (230831-50)
Download ImageAsymmetric folds in marble and quartzite
Asymmetric antiform-synform pair in marble and quartzite. Rock is of the Plattenkalk Series, Crete, Greece. (180329-68)
Download ImageSoft-sediment deformation in Pliocene lakebeds
Soft-sediment deformation expressed as folded Pliocene lakebeds of the Coso Formation, SE California. (180302-20)
Download ImageTransposed quartz veins in schist
Transposition fabric expressed by isoclinally folded quartz veins and detached fold hinges in schist, New Zealand. (180129-5)
Download ImageBedding and slaty cleavage, Tennessee
Bedding and slaty cleavage, Precambrian Wilhite Fm, Tennessee. Note how the cleavage refracts to a higher angle in the coarser grained beds. (171120-46)
Download ImageRecumbently folded calc-silicate gneiss
Recumbently folded calc-silicate gneiss near Kettle Falls, Washington (150803-77)
Download ImageDeformed dike in mylonite
Folded felsic dike in mylonitic rock–indicates deformation continued after intrusion. Okanogan Metamorphic Core Complex, Washington. (150803-47)
Download ImageDeformed metaconglomerate (vertical)
Stretched pebble conglomerate of the Precambrian Grandfather Mountain Formation, North Carolina. Photo shows planes parallel and perpendicular to foliation (xy and xz planes of strain ellipsoid). Blue Ridge Province of Appalachian Mountains. (171118-96)
Download ImageBedding and foliation
Bedding and foliation in deformed metaconglomerate. Stretched pebbles lay in the plane of foliation whereas bedding is defined by the subhorizontal fine-grained zone in the middle of the photo. Grandfather Mountain Formation, North Carolina. Blue Ridge Province of Appalachian Mountains. (171118-88)
Download ImageFolded radiolarian chert (Vertical)
Folded beds of Jurassic-Cretaceous age radiolarian (ribbon) chert in Marin Headlands, California. (Image ID# 111205-10)
Download ImageDuctile shear zone in schist
Ductile shear zone offsets leucrocratic zones –everything is cut by a pegmatite dike (SrD-55)
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Coexisting ductile and brittle behavior
Coexisting ductile and brittle behavior: broken pegmatite “intruded” by ductiley flowing calcite marble (SrD-49)
Download ImageSlaty Cleavage and bedding in folds
Slaty Cleavage and bedding in anticline-syncline pair. Devonian Old Red Sandstone, SW Wales, UK (SrD-43)
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Sheath fold in marble.
Sheath folds are defined by foliation that forms a full circle on the plane of exposure. In 3 dimensions they resemble socks. (SrD-32)
Download ImageRecumbent fold in marble.
Note thickening in hinges, a characteristic of ductile flow. (SrD-17)
Download ImageOverturned anticline, Death Valley, CA.
Aerial view of Titus Canyon Anticline, Death Valley National Park, California. This mountain-scale fold is an overturned anticline–the oldest rock lies in the core. Prominent dark red cliffs on right side made of Cambrian Zabriskie Quartzite; younger Carrara Formation makes brownish clffs to left. At the level of the canyon bottom, note how the rock is overturned. SrD-10.
Download ImageAnticline-syncline pair
Anticline-syncline pair in Devonian Old Red Sandstone exposed in cliff face, SW Wales, UK (SrD-03)
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