Sandstone should generate deeper into the earth

Caves generating in deserts should be comprised mostly of sandstone. Sandstone should generate deeper into the earth, creating a new cavetype. These can be complimented with sandstone variants of copper, coal, and possibly iron. The other ores could receive the same, but it may not be nessicary. Especially for Redstone and diamond. It would be cool to see husks and new dungeons spawn in the sandstone caves.