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Index of Subjects Hi Gloria, Paul & All, Dec 26, 2006 With that lead I looked in Brodo, Sharnoff & Sharnoff (Lichens of N.A.) and found sea tar [aka black seaside lichen (_Verucaria maura_)]. Not a positive ID but a likely suspect. Their comments include-- 'mainly on siliceous, coastal rocks in the upper part of the intertidal zone and continuing into the salt-spray zone'...' It can easily be mistaken (and has been) for the residue of oil spills...' Yt, DW, Kentville Gloria Gilbert wrote: > During a guided walk at Thomas Raddall Park when the Port Joli Basin > Conservation Society launched their new brochure on lichens, I learned > that the black greasy deposit on rocks just below the high tide mark > is actually a tiny lichen. Of course this means that an algae is > present too, since they live in symbiosis. > > > > The really interesting question is, "Why does it flourish on some > shorelines and not on others?" > > > > I'll venture a guess that the answer has much to do with the > nourishment of the algae component. > > > > I'm curious too! > > > > Gloria >
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