What is the most common type of rock on Pluto?

Due to the distance and lack of scientific equipment, there is limited information about Pluto's geology. NASA's New Horizons mission discovered that Pluto's surface is comprised mainly of frozen nitrogen, carbon monoxide, and methane. The spacecraft's data also suggested that there are rocky mountains on Pluto's surface, but they are mostly covered with ice.

The most common type of rock on Pluto is believed to be water ice. This is because Pluto's surface temperature can drop as low as -378 degrees Fahrenheit, which is cold enough for water to freeze solid. Additionally, the abundance of methane and nitrogen on Pluto's surface could indicate that there are methane and nitrogen ices as well.

It's important to note that the information we have about Pluto's geology is still very limited, and we will need more exploration and research to understand the dwarf planet's surface and composition better.