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Index of Subjects Hi all- The general explanation given for the purple sands at the KSA is that they are in fact heavy mineral sands as suggested by Ian (garnets, in fact) weathered out of the Meguma Terrane rocks of the headlands near the beaches. Cheers, Brian On 5/19/07, iamclar@dal.ca <iamclar@dal.ca> wrote: > Hi again, Sherman. > > I removed magenta from the pics, and the background tones became more natural on > my screen, but the pink (more pale mauve, I'd say) remains on the outer beach. > I think this might result from a sorting of heavy mineral sands (Zircon). But > perhaps others are right about an organic origin. It is unlikely that beach > sands would be anoxic enough and laden with sulphides to harbour "purple > Cyanobacteria" (I don't know current taxonomic assigment), which produce this > sort of colour on saltmarsh muds. > > Cheers, Ian McLaren >
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