Marine Endolithic Cyanobacteria - 1
Petrographic thin section through an ooid grain, ca 0.5 mm diameter
from ooid shoals at Joultar's Cays, near Andros Island Bahamas. Ooids
are pearl-like spherical grains that form in layers over thousands of
Note the emptied tunnels of microbial endoliths along the lower right
edge of the grain. The dark spotted zone marks an earlier period of
endolith activities that alternated with the carbonate accretion.
(courtesy Dr. S.E. Campbell).
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