Black Iceberg Photo Goes Viral Online

A black iceberg photo went viral online after it made its way on Reddit.

Black iceberg photo viral online (Image: "Rundboll")

The photo of the unusual iceberg, which was posted Friday by Redditor "Rundboll," has amassed more than 1,200 comments and over 20,000 up votes and is widely shared in other social media sites.

According to the Canada Encyclopedia, the black color is due to the iceberg's high density, absence of bubbles, and the presence of rock materials derived from the base of the parent glacier.

"Most icebergs are white except along freshly calved ice cliffs, which tend to appear blue. Others may appear green, brown or black, or combinations of these colours. These icebergs have usually rolled over, exposing basal ice, or have emerged from below water level. The various colorations are caused by differences in density, air-bubble content and impurities. For example, black ice is of high density and bubble free; 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. "

Have you ever seen a dark-colored iceberg?