décollement

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décollement

[dā′käl·mənt]
(geology)
Folding or faulting of sedimentary beds by sliding over the underlying rock.
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The stratigraphic column of the Zagros consists of several competent stiff layers that are separated by evaporate or shale layers, involved in deformation as intermediate decollements [19,23] (Fig 5).
1) Basement group (Precambrian), (2) Lower mobile group (Hormuz salt, decollement level), (3) Competent group
La formation de failles en chaine dans la levre superieure au cours du stade plus recent a repete par endroits l'ancienne geometrie du socle et du conglomerat, reproduite par des decollements, pour former les ceintures etroites observees.
And from these flat decollements sprang up a system of smaller, vertical faults called splays that reach for the surface like tree branches.