AST101H1 Lecture Notes - Lecture 16: Point Venus, Continental Drift, No Rain
30 Oct 2018
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Changing the surface via geological activity: there are processes that are changing the surface of a planet, craters, volcanoes, tectonics and erosion. Venus: impact cratering: entire surface was repaved 750 million years ago, not many craters, fewer than the moon, mercury or mars. Venus: volcanism: spots of increasing temperature that may be active lava flows, has many volcanoes, there may be active volcanoes on venus. Venus: tectonics: fractures and fault lines that suggest that there was continental drift and earthquakes, there are no earthquakes on venus now, but there were at some point. Venus: erosion: no wind (comes from rotation, rotates very slowly, no air blowing things around, extreme heat, no rain or snow. Volcanism on mars: olympus mons: volcanoes take up large fractions of mars" surface, largest volcano in the solar system: olympus mons, 21km high, 3 times higher than mount everest.
