Saturn’s moon Titan runs the same weather cycle as Earth rivers and seas liquid doing all the work is methane, and the bedrock underfoot is water frozen at nearly minus 180 degrees, harder than most stone on Earth
Saturn’s largest moon runs a full hydrological cycle — clouds, storms, rivers, lakes, seas — but the rain is liquid methane and the bedrock is water ice frozen to about minus 179 Celsius, hard enough to build mountains from.
