Mars
Introduction
Mars is a realm above Space and below the Warzone, generating from 11km to 17km high but requring the priv from 10km to 17km high. It has desert sand, desert stone, various ores and caves of overworld. It requires 50,000 xp (Iron Mayor) to enter. Mars is in a vacuum, so get a spacesuit before going in.
Ores
All ores in Mars except colored marble have an average distance of 24 between each other, have approximately 27 blocks of ore and have a size of 10 meters in size (according to the source code).
Colored marble has 3 types: red, blue and black. Colored marble ores have an average distance of 7 between each other, have 5 blocks of ore and are 5 meters in size.
Bedrock
The bedrock in the bottom of Mars is suprisingly breakable: it can be dug with drills, replaced with a node replacer, pushed by a mesecon piston and potentially mined with a quarry. However, it doesn't give any drops.