Granite, Andesite, and Dorite Caves

I think that we should have granite, Dorite, and Andesite Caves. They would spawn from Y:20 - Y:55. But special mobs would spawn the caves in the Dorite there would be skeletons in chainmail armour with enchanted bows they would also spawn in Andesite in the Dorite caves there would also be zombies with enchanted chainmail armour with iron axes. The special zombies also spawn in the granite caves. It would have the loot table of a jungle temple.