Earth and Venus share some interesting similarities. Some of those similarities extend deep into the planets' interiors.
Ishtar Terra is a complex geological region on Venus. New research shows it may have formed through processes similar to Earth's. Image Credit: NASA/JPL/USGS – http://photojournal.jpl.nasa.gov/catalog/PIA00007, Public Domain, https://commons.wikimedia.org/w/index.php?curid=18235544
Ishtar Terra is one of three large highland regions on Venus. Its topography includes mountains, plains, and plateaus. Themountain chain is in Ishtar Terra, and it’s about 11 km high, compared to Mt. Everest, which is 8.8 kilometres . Click on the image to explore an interactive 3D map of Ishtar Terra at Sketchfab by user v7x. Image Credit: Sketchfab/v7x
This suggests that the planets have or had processes in common. Ishtar Terra and Venus’ other terrae may have risen from the planet’s hot interior. While there are several competing explanations for the formation of Earth’s cratons, one is the molten plume model. It states that rising plumes of molten rock came from deep within Earth’s mantle and built up thick layers with the cratons on top.
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