Page 63 - Ultimate Visual Dictionary (DK)

F AULTS AND FOLDS

EXAMPLES OF FOLDS
Overturned Overthrust
Anticlinorium Monocline Syncline fold fold Chevron
fold

Synclinorium Anticline Isocline
Recumbent Fan Box Cuspate
fold fold fold fold

EXAMPLES OF FAULTS
Sinistral strike-slip Dextral strike-slip
(lateral) fault (lateral) fault Horst Tear fault

Normal Thrust fault Oblique-slip Cylindrical
dip-slip fault Reverse fault Graben fault
dip-slip fault

SMALL-SCALE ROCK DEFORMATIONS
Masses of rock shear En échelon
Competent Incompetent past each other fracture
bed (rocks bed
that break) Tension Tension Tension Tension Tension Tension

Tension
Tension Incompetent bed Competent Competent Competent Joint opened
(rocks that bend) bed breaks bed bed splits by stress
into sections into prisms
BOUDIN MULLION EN ECHELON FRACTURE

Horizontal bed
Dipping bed Gently folded bed Mineral-filled fault
Mineral-filled
fault Dipping bed

Upper Carboniferous Millstone Grit Upper Carboniferous Coal Measures

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