Sequence of Tectonic Deformation in the History of Venus: Evidence from Global Stratigraphic Relations

Mathematics – Logic

Scientific paper

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Plains: Volcanic, Ridge Belts, Tectonics, Tesserae, Wrinkle Ridges

Scientific paper

Analysis of local and regional stratigraphic relationships has permitted the assessment of the nature of tectonic structures and their distribution throughout the observed history of Venus. We find that regional shortening characteristic of the tessera gives way to widespread distributed extension, followed by compression (peaking during and just following the emplacement of the majority of the volcanic plains), which wanes in significance with time (ridge belts ->wrinkle ridges). Focused extensional deformation (rift systems and fracture belts) dominates the later stages of geologic history. These trends appear well-established from a stratigraphic point of view and provide guidelines and constraints on models for Venus geologic history.

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