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Folded pegmatite boudins in gneiss

Folded pegmatite boudins in gneiss, Colorado. (SrD-36)

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Slaty cleavage and bedding in sandstone.

Slaty cleavage and bedding in Devonian Old Red Sandstone, Wales, UK. (SrD-41)

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Metamorphosed and deformed conglomerate.

Metamorphosed and ductiley deformed conglomerate, Newport, Rhode Island (SrD-37)

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Boudinage in marble (vertical).

Boudinage of calc-silicates in marble. (SrD-34)

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Boudinage of pegmatite in schist

SrD-35

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Monocline, NE Utah.

Folded Weber Sandstone (Pennsylvanian) forms a monocline near Dinosaur National Monument, Utah-Colorado. (SrD-23)

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Asymmetric folds in marble.

SrD-31

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Boudinage of chert in limestone (vertical).

SrD-53

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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)

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Folded Archean gneiss (vertical)

Folded Archean gneiss, Grand Teton National Park, Wyoming. (SrD-29)

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Disharmonic folds in gneiss.

Disharmonic folds in gneiss. (SrD-28)

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Monocline, SE Utah.

Raplee Monocline and San Juan River, near Mexican Hat, SE Utah. (SrD-26)

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Isoclinal fold in marble.

SrD-30

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Monocline, NE Utah.

Folded Weber Sandstone (Pennsylvanian) forms a monocline near Dinosaur National Monument, Utah-Colorado. (SrD-27)

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Upright syncline in limestone (vertical)

(SrD-20)

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Ptygmatic folds in schist (vertical)

ptygmatically folded pegmatite vein in schist (SrD-22)

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Monocline and San Juan River, SE Utah.

Rafters on San Juan River and Raplee Monocline (SrD-25)

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Monocline, SE Utah.

Raplee Monocline near Mexican Hat, SE Utah. (SrD-24)

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Recumbent folds in limestone, Switzerland.

SrD-14

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Horizontally plunging isoclinal fold (vertical)

Horizontal isoclinal fold in sandstone and shale, Arkansas. (SrD-21)

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Assymetric folds in gneiss, SE Cal.

SrD-18

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