Mercury is a very rocky planet. It is heavily cratered and is scattered with boulders and pulverized dust. Mercury has been geologically dead for a long time according astronomers. The planet has no signs of any type of weather such as clouds, rivers, and dust storms. The planet of Mercury closely resembles Earth's Moon. Mercury's surface shows intercrater plains, basins, smooth plains, craters, and tectonic features. Many of the smooth plains located on Mercury seem to be a result from flood volcanism. Some other features of Mercury geology are vents that are a result from magma-carved valleys and "hollows" that are believed to be from collapsed magma chambers. There are mineral deposits and thrust faulting near the poles of Mercury. Overall, the planet of Mercury is a very barren planet with not much geology to study.

The atmosphere of Venus is made up of different components. It is made up of 96.5% carbon dioxide and 3.5% of nitrogen. Though almost all of the atmosphere of Venus is made up of carbon dioxide and nitrogen, there are traces of carbon monoxide, argon, helium, and neon. The atmosphere …show more content…
The first type is Divergent tectonic plates. These plates move apart from each other. The Divergent tectonic plates are also known as a constructive boundary or an extensional boundary. The second type of tectonic plates are Subduction tectonic plates. Subduction tectonic plates are an oceanic plate that moves under a continental plate. Subduction tectonic plates cause those most violent earthquakes and volcano eruptions. When the oceanic and continental plate converge, they sink into mantle and cause the volcanic eruptions to take place. The last type of tectonic plates are Transform tectonic plates. Transform tectonic plates slide back and forth against one another. All three types of tectonic plates, Divergent, Subduction, and Transform are in the Lithosphere, which is Earth's topmost layer of