Unformatted text preview: . Second, the structural signature of
deformation is analyzed to approximately define the orientation of finite strain axes, and the magnitude of strain
recorded by mesoscopic fabric elements. Together, these stratigraphic and structural criteria were used to propose a
history of deformation and sedimentation that was geometrically and kinematically tested using two- and threedimensional models (Montes et al., in press).
The Piedras-Girardot foldbelt
This foldbelt is located in the only segment of the northern Andes where the Cordilleras Central and Oriental
overlap, thus opening a unique window into an area key to understanding the interaction between the Caribbean,
South American, and Nazca plates (Fig. 1). This anomalous geomorphic province exposes critical relationships
between the Cordilleras Oriental and Central covered elsewhere by Neogene deposits. Two very distinctive
stratigraphic packages are exposed in the Piedras-Girardot foldbelt: a Late Cretaceous marine carbonate and
siliciclastic sequence, and a Tertiary nonmarine, coarse grained, and mostly red siliciclastic sequence...
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- Winter '14
- Plate Tectonics, Northern Andes, Piedras-Girardot foldbelt