Stromatolite marble, sedimentary rock, Eagle Head Lake, Thunder Bay, Ontario. Stromatolite marble is formed as layers by cyanobacteria or algae. It formed in a quite area of a salt sea. The layers formed as sediment collected on the sticky mat of cyanobacteria. Similar structures are forming today in the sea off northern Australia and in the springs such as those found in Yellowstone National Park. This marble takes a good polish and could be used as a decorative stone.
Loading the stromatolitic marble from Thunder Bay, Ontario where it was collected. Myra Kennedy of the Ministry of Natural Resources helped to find this specimen and assisted with loading it into back of truck.
