Geology of the Rocky Mountains Front Range and The Garden of the Gods @TheGeoModels

Uploaded March 2019 | Updated September 2026, 5 hours ago

This video shows how sedimentary layers were tilted vertical and then exposed by erosion to produce the interesting rock formations at the foot of the Colorado Front Ranges. The model is not perfect--it was allowed to run a bit too long, and it cannot demonstrate compensation for thrust loading of the crust, but it does give an idea of how the layers were tilted in front of deep crustal rocks and then unburied by regional uplift and erosion.

Geology of the Rocky Mountains Front Range and The Garden of the Gods

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

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