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Abstract
Around 80% of the Venusian surface is covered by volcanic plains that contain prominent, sinuous, and canali-like lava channels called valles that are hundreds to thousands of kilometers in length and maintain constant widths of several kilometers. Along these channels, the topography has changed, which has previously only been reported along Baltis Vallis caused by long-wavelength and short-wavelength topographic undulations from regional uplift, subsidence, or local structures (faults, volcanoes, craters). I conducted a global survey of the channels and mapped 33 using a systematic mapping approach to extract geologic observations, topography, and dynamic topography to document the commonality and nature of these topographic undulations. Many observations are explained by dynamic topography, and it is one of the youngest phenomena to affect the surface. These findings imply that mantle convection is responsible for many topographic changes and that it plays an important role for heat transfer and internal processes on Venus.