Submitted by: David Thompson
Taxon: Collenia undosa
Submit date: 2008-02-24
Location (approximate): Marquette, Marquette, MI
Stratigraphy: Kona Dolomite Formation
Age: Precambrian ()
Submitter notes: This is an example of the 'Kona Dolomite' which is a stromatolite formed by the Cyanophyte, Collenia undosa. This is Pre-Cambrian from the Kona hills of Marquette County and shows the layered banding of sediments characteristic of Stromatolites. The actual blue-green algae is not present.