Iron Range Stromatolites

Notes specific to this specimen: Beautiful deep red agatization in these colonies attest to the classic origin of this specimen as being from the old Mary Ellen Mine in Biwabik, Minnesota, the type locality for the Biwabik Iron Formation. The mine shut down over 50 years ago. Notice the off-set angle of the growth pattern in this piece. This is attributed to constant water currents in the area where these colonies were growing. *This specimen comes with a Certificate of Authenticity and Origin

SIZE: 4″ x 7″ x .3″

Name: Collenia undosa
Unit: Biwabik Iron Formation
Site: Biwabik Iron Range, Minnesota
Date: Mid 1990s

Documentation: This authentic fossil specimen comes with a Certificate of Authenticity and Origin.