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Image	Taxa	Strat Unit	Contributor
	Collenia undosa	Kona Dolomite formation	David Thompson
Submitted on 2008-02-24 by David Thompson Location (approximate): Marquette, Marquette, MI Strat unit: Kona Dolomite formation 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. Photo title: Collenia undosa, Kona Dolomite Taxa present: Collenia undosa View full record
	Collenia undosa	Kona Dolomite formation	David Thompson
Submitted on 2008-02-24 by David Thompson Location (approximate): Marquette, Marquette, MI Strat unit: Kona Dolomite formation Submitter notes: This is a closer view of the previous block. Although the Kona Dolomite started out as dolomite, the pressures exerted through 2.2 Billion years has turned this into a rich marble with quartz inclusions and attractive colors Photo title: Collenia undosa, Kona Dolomite Taxa present: Collenia undosa View full record