| 7:00 AM-6:30 PM, Colorado Convention Center: |
423. Integrated Analysis of Laramide to Holocene Deformation of the Northeastern Front Range Using 3D Balancing and Comparative Fracture Analysis of Pre- and Post-Laramide Strata
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| Primary Leader: Eric A. Erslev |
| Leader(s): Scott M. Larson |
| Field Trip Description: This field trip will unravel the multistage folding and fracturing of the Rocky Mountains by integrating larger fold and fault geometries with detailed minor fault, joint and paleomagnetic analyses in a transect just south of the Colorado-Wyoming border. Extensive fault analyses in this area of diverse structural trends show both regional Laramide shortening and local deformation partitioning, which are integrated into a restorable 3D model of the Laramide deformation. The timing and mechanisms of extensional fracturing (jointing) are revealed by comparing their orientations to minor faults in the spectacularly folded pre-Laramide strata and to fractures in on-lapping post-Laramide strata. The trip will traverse new open space acquisitions that span the Front Range foothills and include the Lindenmeier archaeological site of the Folsom culture. |
| Field Trip will span: 1 day |
| Sponsor(s): GSA Structural Geology and Tectonics Division |