Ancient Rocks of Michigan's Upper Peninsula

Michigan's Upper Peninsula is home to some of the oldest rocks in the United States and in this episode we'll explore some of them, such as #stromatolites and metamorphosed pillow basalts, as well as some lovely iron mines and remnant rustbelt infrastructure. Just what the hell are stromatolites, anyway? They are fossilized colonies of cyanobacteria that grew in a shallow sea long before the planet's atmosphere was conducive to almost all of the terrestrial life forms we know on Earth today.

We also explore the rustbelt infrastructure and find two species of orchids, man-made mountains at the edge of an iron mine, and a species of shelf mushroom that only grows on birch trees.

Some species found in this episode:
#Euphrasia stricta
#Antennaria parviflora
#Spiranthes incurva
#Picea glauca

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