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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

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...moss growing out of lava rock // Thriving In the Midst Of Adversity! As foretold in the Bible, we are living in “critical times hard to deal with.” (2 Tim.3:1) Family turmoil, health problems, financial stresses are just some of the obstacles that may afflict you. Bible Education in > 700+ languages >> Free www.jw.org >> Something for everyone!

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De l'art gratuit dans la nature. La lave d'un volcan crée des structures et des plis comme des drapés qui peuvent stimuler l'inspiration. // Free and natural art found in nature. Lava from a volcano creates structures and drape-like folds that can be quite inspiring.

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Geodes (Greek γεώδης - ge-ōdēs, "earthlike") are geological secondary structures which occur in certain sedimentary and volcanic rocks. They are themselves of sedimentary origin formed by chemical precipitation. Geodes are essentially hollow, loosely spheroid to oblate masses of mineral matter that may have formed.

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Sedimentary layers with bands of hematite, magnetite (gray/black), and jasper (red) in Precambrian banded iron formations (BIFs) of northern Michigan.

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