[MtnClimber]

It looks like everything is sedimentary rock.

[ETL]

Check out this humongous high-resolution geologic map of Mars! The map is very similar to earthly geologic maps, with rock types and geologic periods.

https://upload.wikimedia.org/wikipedia/commons/1/1f/USGS-MarsMap-sim3292-20140714-crop.png

[ETL]

It must have been astronaut Neil Armstrong who placed that turtle on the rock (on the right) when he was there in 1969. How else could it have gotten there?

__________________________________________________

On a visit to the NASA Jet Propulsion Laboratory in 2005, Jackson Lee made embarrassing news by asking if the Mars Pathfinder had taken an image of the flag planted there in 1969 by Neil Armstrong.[2]

Prior to the 110th Congress, Jackson Lee served on the House Science Committee and on the Subcommittee that oversees space policy and NASA.

http://web.archive.org/web/20100409095818/http://en.wikipedia.org/wiki/Sheila_Jackson_Lee

"Yes, you're right, kids. No astronaut has yet been to Mars.
Democrat Congresswoman Lee doesn't know what she's talking about."

[Red Badger]

Yes, I thought the same thing......................

[ETL]

It looks like everything is sedimentary rock.

Mars, like the Moon, is covered in "regolith", probably the result of countless meteorites impacting the surface over billions of years.

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Regolith: the layer of unconsolidated rocky material covering bedrock.