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Photo of a black iceberg is causing a lot of fascination after it was posted to Reddit. The iceberg stands in sharp contrast to another whitish iceberg in the photo.
MSN Now explains that dark colored icebergs are formed by a higher density of bubble-free ice with a greater amount of rock detritus from the base of the parent glacier. Reddit user Bama011, explains that dark colored icebergs may be green, brown, black or a combination of the colors.
The Reddit user explains:
These icebergs have usually rolled over, exposing basal ice, or have emerged from below water level. The various coloration are caused by differences in density, air-bubble content and impurities... dark layers indicate the presence of rock materials derived from the base of the parent glacier. Occasionally, rocks may be found on the original upper surface of the iceberg. As the iceberg melts, these materials precipitate into marine or lake sediments.
Originally posted by Skywatcher2011
Btw, there is also another article which touches on this topic of black iceberg HERE but in addition to the black iceberg photo, they included an unusually blue looking iceberg as well (see below):
Originally posted by Skywatcher2011
Also, there was another cool picture posted on Reddit by an iceberg washing ashore off the coast of Alaska.
Link found HERE
Just another insight into the world of icebergs and the many flavours that are out there