Early Cretaceous Conomita outcrop: structural analysis of syn-sedimentary gravity-driven deformations (NE Venezuela)

Written by
Carlos Giraldo
Early Cretaceous Conomita outcrop: structural analysis of syn-sedimentary gravity-driven deformations (NE Venezuela)

An updated analysis of Conomita Fold outcrop (Barranquin Fm.) was performed using an image of a field-trip guide-book organized by PDVSA in 1993: Excursion al Frente de Montaña, Venezuela Oriental (Stop # 5). “Remote” structural analysis carried-out along this outcrop reveals the existence of several deformation episodes related to gravity-driven processes. Conomita fold appears to be a slump feature generated in a deltaic setting. Early Cretaceous rocks were strongly tilted during the Miocene-Recent tectonics phase contemporaneously to El Pilar right-lateral strike-slip fault.

  • An updated analysis of Conomita Fold outcrop (Barranquin Fm.)  was performed using  an image of field-trip guide-book organized by PDVSA in 1993: Excursion al Frente de Montaña, Venezuela Oriental (Stop # 5).
  • “Remote”structural analysis carried-out along this outcrop reveals the existence of  several deformation  episodes related to gravity-driven processes. Conomita fold appears  to be a slump feature generated  in a deltaic setting.
  • Early Cretaceous rocks were strongly tilted during Miocene-Recent tectonics phase  contemporaneously to El Pilar right-lateral strike slip fault.
  • Amore exhaustive structural analysis should take into account the original thicknesses of  para-sequences described throughout  the outcrop. A valid restoration study needs to consider the original thicknesses prior to compaction because “soft” deformations occurred during early stage of Barranquin Formation sedimentation.
  • This outcrop could  be used eventually as an analog structure for hydrocarbon reservoirs and fault-seal analysis exercise.
  • Conomita slump  was previously described in: Cabrera, E., Campos, V., Chigne, N.,Hernandez,  Fr. Galea, O. Macsotay and V.Vivas, 1988 Excursión al Frente de Montaña, Venezuela oriental, III Simposio Bolivariano de Cuencas Subandinas,Caracas,51 pp.
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Domains
Structural Geology
Outcrop
Geology
Geography
Venezuela
Eastern Venezuela Basin