Planet:Excaretra

Appearance
The appearance of Excaretra from orbit would be a light brown (like sand), roughly spherical body with green-blue seas. Due to the presence of plasma storms in the system, the greenish colour of the atmosphere can only be seen in the lower layers of the atmosphere.

Geography
The geography of Excaretra consists largely of flat, sandy and somewhat rocky deserts, as well as some dry grassland-like areas. Despite the presence of water in Excaretra's oceans, most cities are located underground in order to protect them from the heat and weather conditions on the surface. The oceans are also incredibly alkaline, with the average pH being around 13. This can be explained by the abundance of elements like magnesium, lithium, aluminium, sodium, and beryllium in the crust. Unlike many planets, Excaretra has very few mountains or areas of high elevation, and also, the thickness of the crust means that there is very little or no seismic activity, with most or all of it caused by the only active/dormant volcano on the surface.

Composition
Unlike Earth, Excaretra is a much larger and rockier planet in composition. If Excaretra was just like Earth, except scaled up in size, among many things, there would be no liquid outer core. As a result of that, there would be no electromagnetic, and the increased heat from radioactive elements in the mantle would've resulted in a much thinner crust and continents would have less time to form due to stronger convection in the mantle. Due to the thickness of Excaretra's crust, most volcanic activity occurs where there are incredibly deep trenches. Most rocks and minerals that can be found on Excaretra are either alkaline silicates or sedimentary rocks like sandstone. Again, the alkalinity of many rocks and minerals on Excaretra can be explained by the abundance of alkaline elements like sodium, lithium, beryllium, aluminium, and magnesium in the crust of Excaretra.

History
The age of Excaretra is estimated to be around 5.695 billion years old based off of dating some of the oldest rock samples as well as some other techniques. Life was estimated to have first formed on Excaretra around 5.2 - 4.8 billion years ago as confirmed by fossils containing the remnants of early microbial life forms.