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25x image of a fossil-bearing lamina from slide HUPC068022.
the matrix
the matrix
Most of the microörganisms within the Gunflint laminae appear to be floating in a gel-like matrix that is now cryptocrystalline silica - chert. Brightness in the slide is due to differences in the density of dispersed organic matter (om). Fossil color varies from brown to dark brown.
Kakabekia umbellifera. These show varying degrees of a condensed central body, but none with an attached bulbil. Scale bars 10µm.
Galaxiopsis melanocentra, Internal topologies could be membrane-based, as differences in color (om density) appear to be contained as concentric spheroids. Projections and lobes indicate cytoskeletal underpinnings of cell membrane shape. Scale bars 10µm.
Well-preserved sheaths are sometimes characterized by a fuzz of EPS. These are consistent with a cyanobacterial origin. They are similar to Eomycetopsis found in the Bitter Springs Chert.
Eubacteria adjacent to a lobate specimen with asteriform content.
Clusters of (un-named) eubacteria
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