FOLDS - ETH Z
207 FOLDS jpb, 2020 FOLDS The term fold is used when one or stacks of originally flat and planar surfaces such as sedimentary beds become bent or curved as a result of plastic ( permanent) and ductile deformation. FOLDS in rocks vary in size from microscopic crinkles to mountain-size FOLDS . They occur singly as isolated FOLDS and in extensive fold trains at all scales. A set of FOLDS distributed on a regional scale constitutes a fold belt. Fold belts are typically associated with convergent plate boundaries and directed compressive stress.
is a quantitative measure of how round or angular the hinge is. It is defined as . B=r r hi where . r. h. ... whilst cross sections normal to this axis display closed geometries. Such elliptical sections or nested rings define ... margins of broad basins or uplift platforms in …
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