The Satan’s Marbles, also called Karlu Karlu, are made up of granite, that's an igneous rock formed via the sluggish cooling and solidification of magma or lava deep beneath the earth’s surface. #DevilsMarbles, just an hour or so's push south of #TennantCreek Fashioned over numerous yrs, the boulders carry on https://joycej284mno1.wikicarrier.com/user