Artistic planetary maps: colourful images of our solar system
The images in this gallery could be Damien Hirst spin paintings or examples of pop art, but they are actually maps of the planets, moons and asteroids in our solar system created from information gleaned by spacecraft and telescopes.
Greenstone -- (Michigan's state gem) was formed in gas bubbles within basalt. Basalt is a volcanic rock, formed in Michigan in part during the Midcontinent Rift approximately one billion years ago. It is found more in the western Upper Peninsula, MI, USA