Shale in fold thrust belts: Triangle zones and passive backthrusts @TheGeoModels

Uploaded December 2017 | Updated September 2026, 4 hours ago

This model uses strong layers and weak microbeads to demonstrate passive roof faulting in a mixed stratigraphy of weak and strong layers. These passive faults involve little displacement, but they would impact cleavage/fracture development in the shale. One model develops the relative backthrust movement through limb rotation; another uses a stratigraphic pinch-out. These models would be improved by weakers detachment layers, but the general style is communicated here.

$Shale in fold thrust belts: Triangle zones and passive backthrusts This model uses strong layers and weak microbeads to demonstrate passive roof faulting in a mixed stratigraphy of weak and strong layers. These passive faults involve little displacement, but they would impact cleavage/fracture development in the shale. One model develops the relative backthrust movement through limb rotation; another uses a stratigraphic pinch-out. These models would be improved by weakers detachment layers, but the general style is communicated here.$

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