Photo 5. Gray sand layer with a solitary white pebble. This pebble was supported by the sand matrix at the time it was deposited, probably in a slurry emplaced as a submarine debris flow or slide. Adjacent layers of pebble conglomerate are visible at the left and right edges of the photograph, showing that the once-horizontal layers are now nearly vertical. Darker spots are merely wet places where a little light snow was brushed away, one November afternoon. (Maine Geological Survey photo)

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Last updated on January 4, 2013

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