The piedras girardot foldbelt has been a positive

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Unformatted text preview: he Piedras-Girardot foldbelt has been a positive area since then, shedding clastic material into these late Paleogene depocenters, that were being concurrently folded. Only the northern part of the study area contains evidence for post-Miocene (Fig 2c.), and Quaternary deformation, which is at least partially related to the latest movements along the Ibagué fault. Microscopic and mesoscopic strain Three fabric elements were investigated: 1) cleavage 2) deformed fossils; and 3) microscopic and mesoscopic veins. Each element provides a partials, and sometimes local story. Together, these elements are used to get a general picture of the contribution of early, nonrigid body deformation in the Piedras-Girardot foldbelt. Cleavage Cleavage is a pervasive, uniform, and prominent outcrop-scale element that trends ENE. Microscopically, cleavage surfaces show a sutured morphology where thin films (approximately 0.1 mm) of insoluble material are concentrated. The amount of shortening accommodated by a rock with a 2 cm domain spacing is less than 5 percent....
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