It has basalt and many others.
There is no crust
: Why do astronomers conclude that the crust on Mars must be thicker then Earth's crust?
Mars is rocky.
No, because mars' crust has a gas that makes its crust grow mehdeas and therefore earth has a much stronger crust.
Mars has no rings.
A very thin atmosphere that is similar to Earth's with carbon dioxide, nitrogen, argon, oxygen, carbon monoxide, water vapor, and other gases. also very high in iron and rock (various minerals). The primary composition of Mars is sulfur and iron. It also contains iron oxide on its surface, which gives Mars its red appearance.
Mars
Mars is made of a solid iron core.
miles
rocky
Mars is smaller than Earth and consequently cooled quicker. Mars no longer has a molten core like Earth, so it would be fair to say it has a thicker crust.
The crust is thinner in the north.