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Sable sand grains are small and rounded, and made of hard
minerals. More than 90% are quartz. These are clues to the
age of the sand. Because quartz is the hardest and most
stable of common minerals, sand with a high percentage of
quartz must be very old.
Sable Island sand comes from
glacial till — piles of boulders, sand and clay left on
the ocean banks by melting glaciers about 19,000 years ago.
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