Tannin and Shale

One of my favorite places in the Porcupine Mountains is the boardwalk along the Presque Isle River – a short trail runs along the river on its final approach to Lake Superior, and a couple features make this beautiful spot stand out. One is the caramel color of the water as it tumbles over a series of waterfalls and rapids.

This comes from the tannin in the cedars and other plants that line the river and decompose in the water. Tannin also makes the water foamy, creating huge drifts of suds in some places and interesting patterns on the surface in others.

The river has carved through the areas’ layers of shale bedrock and shaped some pretty scenic rock formations. It’s hard to do it justice in photographs.

If you’re ever in the UP, don’t miss the Porkies. They may not be the most mountainous mountains you’ll ever see, but they’re definitely beautiful.

2 replies on “Tannin and Shale”

Thanks! The park is really worth a visit. All the locals here call the Porcupine Mountains the “Porkies” for short, and we tend to forget how silly that sounds until someone who’s not used to it points it out. :)

Comments = love!

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s