Fossil Worm Castings...or perhaps worm burrows?

A large rock slab with a lot of worm castings (worm poop) From Rt. 380 northeast of Pittsburgh PA.

Flickr page for this photo.

Visit the Eye for Science Flickr group.

Get the "Eye for Science" widget here and install it on your own blog. Spread the scienticity!

Like this image? Want it for your smartphone wallpaper?
Use this QR Code to load it on your smartphone and enjoy!