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Stromatolite: Archaeozoon acadiense Matthew

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Colour image of gray rock with light gray circles
Stromatolite: Archaeozoon acadiense Matthew. Precambrian. Green Head, Saint John, New Brunswick. Collector: W. Murdoch, 1890. New Brunswick Museum (NBMG 3200). Specimen width 124 cm. This slab of stromatolites was collected in 1890 by William Murdoch and presented to the Natural History Society of New Brunswick the same year. Stromatolites structures are built by cyanobacteria and are the most common fossil structures found in Precambrian rocks.